diff --git a/.github/PULL_REQUEST_TEMPLATE.md b/.github/PULL_REQUEST_TEMPLATE.md
new file mode 100644
index 0000000..f2fb620
--- /dev/null
+++ b/.github/PULL_REQUEST_TEMPLATE.md
@@ -0,0 +1,8 @@
+# Checklist
+<!-- Put an `x` in each box when you have completed the items. -->
+- [ ] App update process has been followed <!-- See comment below -->
+- [ ] Target branch is `develop` <!-- unless you have a very good reason -->
+- [ ] Application version has been bumped <!-- required if your changes are to be deployed -->
+
+<!-- Make sure you followed the process described in https://developers.ledger.com/docs/device-app/deliver/maintenance before opening your Pull Request.
+Don't hesitate to contact us directly on Discord if you have any questions ! https://developers.ledger.com/discord -->
diff --git a/.github/workflows/build_and_functional_tests.yml b/.github/workflows/build_and_functional_tests.yml
new file mode 100644
index 0000000..2ad08a1
--- /dev/null
+++ b/.github/workflows/build_and_functional_tests.yml
@@ -0,0 +1,29 @@
+name: Build and run functional tests using ragger through reusable workflow
+
+# This workflow will build the app and then run functional tests using the Ragger framework upon Speculos emulation.
+# It calls a reusable workflow developed by Ledger's internal developer team to build the application and upload the
+# resulting binaries.
+# It then calls another reusable workflow to run the Ragger tests on the compiled application binary.
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - master
+      - main
+      - develop
+  pull_request:
+
+jobs:
+  build_application:
+    name: Build application using the reusable workflow
+    uses: LedgerHQ/ledger-app-workflows/.github/workflows/reusable_build.yml@v1
+    with:
+      upload_app_binaries_artifact: "compiled_app_binaries"
+
+  ragger_tests:
+    name: Run ragger tests using the reusable workflow
+    needs: build_application
+    uses: LedgerHQ/ledger-app-workflows/.github/workflows/reusable_ragger_tests.yml@v1
+    with:
+      download_app_binaries_artifact: "compiled_app_binaries"
diff --git a/.github/workflows/ci-workflow.yml b/.github/workflows/ci-workflow.yml
index b47ac57..7b53a3d 100644
--- a/.github/workflows/ci-workflow.yml
+++ b/.github/workflows/ci-workflow.yml
@@ -12,54 +12,6 @@ on:
       - develop
 
 jobs:
-  nanos_build:
-    name: Build app for NanoS
-    runs-on: ubuntu-latest
-    container:
-      image: ghcr.io/ledgerhq/ledger-app-builder/ledger-app-builder:latest
-    steps:
-      - name: Clone
-        uses: actions/checkout@v2
-      - name: Build
-        run: make
-      - name: Upload app binary
-        uses: actions/upload-artifact@v2
-        with:
-          name: celo-app
-          path: bin
-
-  nanox_build:
-    name: Build app for NanoX
-    runs-on: ubuntu-latest
-    container:
-      image: ghcr.io/ledgerhq/ledger-app-builder/ledger-app-builder:latest
-    steps:
-      - name: Clone
-        uses: actions/checkout@v2
-      - name: Build
-        run: make BOLOS_SDK=$NANOX_SDK
-      - name: Upload app binary
-        uses: actions/upload-artifact@v2
-        with:
-          name: celo-app
-          path: bin
-
-  job_scan_build:
-    name: Clang Static Analyzer
-    runs-on: ubuntu-latest
-    container:
-      image: ghcr.io/ledgerhq/ledger-app-builder/ledger-app-builder:latest
-    steps:
-      - uses: actions/checkout@v2
-      - name: Build with Clang Static Analyzer
-        run: |
-          make clean
-          scan-build --use-cc=clang -analyze-headers -enable-checker security -enable-checker unix -enable-checker valist -o scan-build --status-bugs make default
-      - uses: actions/upload-artifact@v2
-        if: failure()
-        with:
-          name: scan-build
-          path: scan-build
 
   job_unit_test:
     name: Unit test
@@ -71,7 +23,7 @@ jobs:
         uses: actions/checkout@v2
       - name: Build unit tests
         run: |
-          cd tests/
+          cd tests/unit
           cmake -Bbuild -H.
           make -C build
           make -C build test
diff --git a/.github/workflows/guidelines_enforcer.yml b/.github/workflows/guidelines_enforcer.yml
new file mode 100644
index 0000000..fdaf9f2
--- /dev/null
+++ b/.github/workflows/guidelines_enforcer.yml
@@ -0,0 +1,23 @@
+name: Ensure compliance with Ledger guidelines
+
+# This workflow is mandatory in all applications
+# It calls a reusable workflow guidelines_enforcer developed by Ledger's internal developer team.
+# The successful completion of the reusable workflow is a mandatory step for an app to be available on the Ledger
+# application store.
+#
+# More information on the guidelines can be found in the repository:
+# LedgerHQ/ledger-app-workflows/
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - master
+      - main
+      - develop
+  pull_request:
+
+jobs:
+  guidelines_enforcer:
+    name: Call Ledger guidelines_enforcer
+    uses: LedgerHQ/ledger-app-workflows/.github/workflows/reusable_guidelines_enforcer.yml@v1
diff --git a/.gitignore b/.gitignore
index d9280d1..486d2c2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,7 +1,8 @@
 bin
 debug
-dep
-obj
 src/glyphs.c
 src/glyphs.h
 
+tests/python/snapshots-tmp/
+__pycache__
+build/
diff --git a/Makefile b/Makefile
index f57702c..00a6c10 100755
--- a/Makefile
+++ b/Makefile
@@ -24,14 +24,14 @@ APP_LOAD_PARAMS= --curve secp256k1 $(COMMON_LOAD_PARAMS)
 
 APPVERSION_M=1
 APPVERSION_N=1
-APPVERSION_P=8
+APPVERSION_P=10
 APPVERSION=$(APPVERSION_M).$(APPVERSION_N).$(APPVERSION_P)
 
 # Celo
 APP_LOAD_PARAMS += --path "44'/52752'"
 APPNAME = "Celo"
 APP_LOAD_FLAGS=--appFlags 0
-ifeq ($(TARGET_NAME), TARGET_NANOX)
+ifeq ($(TARGET_NAME),$(filter $(TARGET_NAME),TARGET_NANOX TARGET_STAX))
 APP_LOAD_FLAGS=--appFlags 0x200  # APPLICATION_FLAG_BOLOS_SETTINGS
 endif
 APP_LOAD_PARAMS += $(APP_LOAD_FLAGS)
@@ -39,6 +39,8 @@ APP_LOAD_PARAMS += $(APP_LOAD_FLAGS)
 #prepare hsm generation
 ifeq ($(TARGET_NAME), TARGET_NANOS)
 ICONNAME=nanos_app_celo.gif
+else ifeq ($(TARGET_NAME),TARGET_STAX)
+ICONNAME=stax_app_celo.gif
 else
 ICONNAME=nanox_app_celo.gif
 endif
@@ -53,10 +55,9 @@ all: default
 ############
 
 DEFINES   += OS_IO_SEPROXYHAL
-DEFINES   += HAVE_BAGL HAVE_SPRINTF
+DEFINES   += HAVE_SPRINTF
 DEFINES   += HAVE_IO_USB HAVE_L4_USBLIB IO_USB_MAX_ENDPOINTS=6 IO_HID_EP_LENGTH=64 HAVE_USB_APDU
 DEFINES   += LEDGER_MAJOR_VERSION=$(APPVERSION_M) LEDGER_MINOR_VERSION=$(APPVERSION_N) LEDGER_PATCH_VERSION=$(APPVERSION_P)
-DEFINES   += HAVE_UX_FLOW
 
 # U2F
 DEFINES   += HAVE_U2F HAVE_IO_U2F
@@ -71,7 +72,7 @@ DEFINES   += APPVERSION=\"$(APPVERSION)\"
 
 DEFINES   += HAVE_WEBUSB WEBUSB_URL_SIZE_B=0 WEBUSB_URL=""
 
-ifeq ($(TARGET_NAME),TARGET_NANOX)
+ifeq ($(TARGET_NAME),$(filter $(TARGET_NAME),TARGET_NANOX TARGET_STAX))
 DEFINES   += HAVE_BLE BLE_COMMAND_TIMEOUT_MS=2000
 DEFINES   += HAVE_BLE_APDU # basic ledger apdu transport over BLE
 endif
@@ -80,12 +81,21 @@ ifeq ($(TARGET_NAME),TARGET_NANOS)
 DEFINES   += IO_SEPROXYHAL_BUFFER_SIZE_B=128
 else
 DEFINES   += IO_SEPROXYHAL_BUFFER_SIZE_B=300
-DEFINES   += HAVE_GLO096
-DEFINES   += HAVE_BAGL BAGL_WIDTH=128 BAGL_HEIGHT=64
-DEFINES   += HAVE_BAGL_ELLIPSIS # long label truncation feature
-DEFINES   += HAVE_BAGL_FONT_OPEN_SANS_REGULAR_11PX
-DEFINES   += HAVE_BAGL_FONT_OPEN_SANS_EXTRABOLD_11PX
-DEFINES   += HAVE_BAGL_FONT_OPEN_SANS_LIGHT_16PX
+endif
+
+ifeq ($(TARGET_NAME),TARGET_STAX)
+    DEFINES += NBGL_QRCODE
+    SDK_SOURCE_PATH += qrcode
+else
+    DEFINES += HAVE_BAGL HAVE_UX_FLOW
+    ifneq ($(TARGET_NAME),TARGET_NANOS)
+        DEFINES += HAVE_GLO096
+        DEFINES += BAGL_WIDTH=128 BAGL_HEIGHT=64
+        DEFINES += HAVE_BAGL_ELLIPSIS # long label truncation feature
+        DEFINES += HAVE_BAGL_FONT_OPEN_SANS_REGULAR_11PX
+        DEFINES += HAVE_BAGL_FONT_OPEN_SANS_EXTRABOLD_11PX
+        DEFINES += HAVE_BAGL_FONT_OPEN_SANS_LIGHT_16PX
+    endif
 endif
 
 # Enabling debug PRINTF
@@ -137,11 +147,17 @@ include $(BOLOS_SDK)/Makefile.glyphs
 
 ### variables processed by the common makefile.rules of the SDK to grab source files and include dirs
 APP_SOURCE_PATH  += src_common src
-SDK_SOURCE_PATH  += lib_stusb lib_stusb_impl lib_u2f lib_ux
-ifeq ($(TARGET_NAME),TARGET_NANOX)
+SDK_SOURCE_PATH  += lib_stusb lib_stusb_impl lib_u2f
+
+ifeq ($(TARGET_NAME),$(filter $(TARGET_NAME),TARGET_NANOX TARGET_STAX))
 SDK_SOURCE_PATH  += lib_blewbxx lib_blewbxx_impl
 endif
 
+ifneq ($(TARGET_NAME),TARGET_STAX)
+SDK_SOURCE_PATH += lib_ux
+endif
+
+
 load: all
 	python -m ledgerblue.loadApp $(APP_LOAD_PARAMS)
 
diff --git a/glyphs/celo_64px.gif b/glyphs/celo_64px.gif
new file mode 100644
index 0000000..2cd945c
Binary files /dev/null and b/glyphs/celo_64px.gif differ
diff --git a/glyphs/icon_toggle_reset.gif b/glyphs/icon_toggle_reset.gif
deleted file mode 100644
index 450bc86..0000000
Binary files a/glyphs/icon_toggle_reset.gif and /dev/null differ
diff --git a/glyphs/icon_toggle_set.gif b/glyphs/icon_toggle_set.gif
deleted file mode 100644
index 571264c..0000000
Binary files a/glyphs/icon_toggle_set.gif and /dev/null differ
diff --git a/glyphs/icon_warning.gif b/glyphs/icon_warning.gif
deleted file mode 100644
index 1393e05..0000000
Binary files a/glyphs/icon_warning.gif and /dev/null differ
diff --git a/ledger_app.toml b/ledger_app.toml
new file mode 100644
index 0000000..ab5340f
--- /dev/null
+++ b/ledger_app.toml
@@ -0,0 +1,8 @@
+[app]
+build_directory = "./"
+sdk = "C"
+devices = ["nanos", "nanox", "nanos+", "stax"]
+
+[tests]
+unit_directory = "./tests/unit"
+pytest_directory = "./tests/python"
diff --git a/src/celo.c b/src/celo.c
index b1ddbfe..ea8f1c1 100644
--- a/src/celo.c
+++ b/src/celo.c
@@ -4,8 +4,7 @@
 #include "os.h"
 #include "utils.h"
 
-// TODO: remove this. This module should be independant from ui
-#include "ui_flow.h"
+#include "ui_common.h"
 
 #include <string.h>
 
@@ -302,7 +301,7 @@ customStatus_e customProcessor(txContext_t *context) {
                 dataContext.rawDataContext.fieldOffset = 0;
                 if (fieldPos == 0) {
                     array_hexstr(strings.tmp.tmp, dataContext.rawDataContext.data, 4);
-                    ux_flow_init(0, ux_confirm_selector_flow, NULL);
+                    ui_confirm_selector_flow();
                 }
                 else {
                     uint32_t offset = 0;
@@ -314,7 +313,7 @@ customStatus_e customProcessor(txContext_t *context) {
                             strings.tmp.tmp[offset++] = ':';
                         }
                     }
-                    ux_flow_init(0, ux_confirm_parameter_flow, NULL);
+                    ui_confirm_parameter_flow();
                 }
             }
             else {
@@ -520,45 +519,39 @@ void finalizeParsing(bool direct) {
   switch(provisionType) {
     case PROVISION_LOCK:
     case PROVISION_UNLOCK:
-      ux_flow_init(0,
-        ux_approval_celo_lock_unlock_flow,
-        NULL);
+        ui_approval_celo_lock_unlock_flow();
       break;
     case PROVISION_WITHDRAW:
-      ux_flow_init(0,
-        ux_approval_celo_withdraw_flow,
-        NULL);
+      ui_approval_celo_withdraw_flow();
       break;
     case PROVISION_VOTE:
     case PROVISION_REVOKE:
-      ux_flow_init(0,
-        ux_approval_celo_vote_revoke_flow,
-        NULL);
+      ui_approval_celo_vote_revoke_flow();
       break;
     case PROVISION_ACTIVATE:
-      ux_flow_init(0,
-        ux_approval_celo_activate_flow,
-        NULL);
+      ui_approval_celo_activate_flow();
       break;
     case PROVISION_RELOCK:
-      ux_flow_init(0,
-        ux_approval_celo_relock_flow,
-        NULL);
+      ui_approval_celo_relock_flow();
       break;
     case PROVISION_CREATE_ACCOUNT:
-      ux_flow_init(0,
-        ux_approval_celo_create_account_flow,
-        NULL);
+      ui_approval_celo_create_account_flow();
       break;
     default:
       if (tmpContent.txContent.gatewayDestinationLength != 0) {
-        ux_flow_init(0,
-          ((dataPresent && !N_storage.contractDetails) ? ux_approval_celo_data_warning_gateway_tx_flow : ux_approval_celo_gateway_tx_flow),
-          NULL);
+          if (dataPresent && !N_storage.contractDetails) {
+              ui_approval_celo_data_warning_gateway_tx_flow();
+          }
+          else {
+              ui_approval_celo_gateway_tx_flow();
+          }
       } else {
-        ux_flow_init(0,
-          ((dataPresent && !N_storage.contractDetails) ? ux_approval_celo_data_warning_tx_flow : ux_approval_celo_tx_flow),
-          NULL);
+          if (dataPresent && !N_storage.contractDetails) {
+              ui_approval_celo_data_warning_tx_flow();
+          }
+          else {
+              ui_approval_celo_tx_flow();
+          }
       }
   }
 #endif // NO_CONSENT
diff --git a/src/main.c b/src/main.c
index 451ae6d..8608d33 100644
--- a/src/main.c
+++ b/src/main.c
@@ -31,10 +31,13 @@
 
 #include "globals.h"
 #include "utils.h"
-
-#include "ui_flow.h"
+#include "ui_common.h"
 
 uint8_t G_io_seproxyhal_spi_buffer[IO_SEPROXYHAL_BUFFER_SIZE_B];
+bolos_ux_params_t G_ux_params;
+ux_state_t G_ux;
+
+
 
 #define APP_FLAG_DATA_ALLOWED 0x01
 #define APP_FLAG_EXTERNAL_TOKEN_NEEDED 0x02
@@ -219,7 +222,7 @@ void handleGetPublicKey(uint8_t p1, uint8_t p2, uint8_t *dataBuffer, uint16_t da
   else {
     // prepare for a UI based reply
     snprintf(strings.common.fullAddress, sizeof(strings.common.fullAddress), "0x%.*s", 40, tmpCtx.publicKeyContext.address);
-    ux_flow_init(0, ux_display_public_flow, NULL);
+    ui_display_public_flow();
     *flags |= IO_ASYNCH_REPLY;
   }
 #endif // NO_CONSENT
@@ -429,17 +432,22 @@ void handleSignPersonalMessage(uint8_t p1, uint8_t p2, uint8_t *workBuffer, uint
     cx_hash((cx_hash_t *)&sha3, CX_LAST, workBuffer, 0, tmpCtx.messageSigningContext.hash, 32);
     cx_hash((cx_hash_t *)&tmpContent.sha2, CX_LAST, workBuffer, 0, hashMessage, 32);
 
+#ifdef HAVE_BAGL
 #define HASH_LENGTH 4
     array_hexstr(strings.common.fullAddress, hashMessage, HASH_LENGTH / 2);
     strings.common.fullAddress[HASH_LENGTH / 2 * 2] = '.';
     strings.common.fullAddress[HASH_LENGTH / 2 * 2 + 1] = '.';
     strings.common.fullAddress[HASH_LENGTH / 2 * 2 + 2] = '.';
     array_hexstr(strings.common.fullAddress + HASH_LENGTH / 2 * 2 + 3, hashMessage + 32 - HASH_LENGTH / 2, HASH_LENGTH / 2);
+#else 
+#define HASH_LENGTH 32
+    array_hexstr(strings.common.fullAddress, hashMessage, HASH_LENGTH);
+#endif
 
 #ifdef NO_CONSENT
     io_seproxyhal_touch_signMessage_ok(NULL);
 #else
-    ux_flow_init(0, ux_sign_flow, NULL);
+    ui_display_sign_flow();
 #endif // NO_CONSENT
 
     *flags |= IO_ASYNCH_REPLY;
@@ -609,9 +617,11 @@ void sample_main(void) {
 }
 
 // override point, but nothing more to do
+#ifdef HAVE_BAGL
 void io_seproxyhal_display(const bagl_element_t *element) {
   io_seproxyhal_display_default((bagl_element_t *)element);
 }
+#endif // HAVE_BAGL
 
 unsigned char io_event(unsigned char channel) {
     UNUSED(channel);
@@ -621,12 +631,16 @@ unsigned char io_event(unsigned char channel) {
 
     // can't have more than one tag in the reply, not supported yet.
     switch (G_io_seproxyhal_spi_buffer[0]) {
+#ifdef HAVE_NBGL
     case SEPROXYHAL_TAG_FINGER_EVENT:
     		UX_FINGER_EVENT(G_io_seproxyhal_spi_buffer);
     		break;
+#endif // HAVE_NBGL
 
     case SEPROXYHAL_TAG_BUTTON_PUSH_EVENT:
+#ifdef HAVE_BAGL
         UX_BUTTON_PUSH_EVENT(G_io_seproxyhal_spi_buffer);
+#endif // HAVE_BAGL
         break;
 
     case SEPROXYHAL_TAG_STATUS_EVENT:
@@ -637,9 +651,13 @@ unsigned char io_event(unsigned char channel) {
     default:
         UX_DEFAULT_EVENT();
         break;
-
     case SEPROXYHAL_TAG_DISPLAY_PROCESSED_EVENT:
+#ifdef HAVE_BAGL
         UX_DISPLAYED_EVENT({});
+#endif // HAVE_BAGL
+#ifdef HAVE_NBGL
+        UX_DEFAULT_EVENT();
+#endif // HAVE_NBGL
         break;
 
     case SEPROXYHAL_TAG_TICKER_EVENT:
@@ -680,16 +698,18 @@ __attribute__((section(".boot"))) int main(void) {
     os_boot();
 
     for (;;) {
+#ifdef HAVE_BAGL
         UX_INIT();
+#endif  // HAVE_BAGL
 
         BEGIN_TRY {
             TRY {
                 io_seproxyhal_init();
 
-#ifdef TARGET_NANOX
+#ifdef HAVE_BLE
                 // grab the current plane mode setting
                 G_io_app.plane_mode = os_setting_get(OS_SETTING_PLANEMODE, NULL, 0);
-#endif // TARGET_NANOX
+#endif // HAVE_BLE
 
                 if (N_storage.initialized != 0x01) {
                   internalStorage_t storage;
@@ -707,7 +727,7 @@ __attribute__((section(".boot"))) int main(void) {
 #ifdef HAVE_BLE
                 // BLE has to be powered on before ui_idle() call for Blue devices only
                 BLE_power(0, NULL);
-                BLE_power(1, "Nano X");
+                BLE_power(1, NULL);
 #endif // HAVE_BLE
                 
                 ui_idle();
@@ -715,9 +735,11 @@ __attribute__((section(".boot"))) int main(void) {
             }
             CATCH(EXCEPTION_IO_RESET) {
               // reset IO and UX before continuing
+              CLOSE_TRY;
               continue;
             }
             CATCH_ALL {
+              CLOSE_TRY;
               break;
             }
             FINALLY {
diff --git a/src/ui_bagl.c b/src/ui_bagl.c
new file mode 100644
index 0000000..8a0f567
--- /dev/null
+++ b/src/ui_bagl.c
@@ -0,0 +1,61 @@
+#ifdef HAVE_BAGL
+#include "ui_common.h"
+#include "ui_flow.h"
+#include "globals.h"
+
+void ui_display_public_flow(void) {
+    ux_flow_init(0, ux_display_public_flow, NULL);
+}
+
+void ui_display_sign_flow(void) {
+    ux_flow_init(0, ux_sign_flow, NULL);
+}
+
+void ui_confirm_selector_flow(void) {
+    ux_flow_init(0, ux_confirm_selector_flow, NULL);
+}
+
+void ui_confirm_parameter_flow(void) {
+    ux_flow_init(0, ux_confirm_parameter_flow, NULL);
+}
+
+void ui_approval_celo_lock_unlock_flow(void) {
+    ux_flow_init(0, ux_approval_celo_lock_unlock_flow, NULL);
+}
+
+void ui_approval_celo_withdraw_flow(void) {
+    ux_flow_init(0, ux_approval_celo_withdraw_flow, NULL);
+}
+
+void ui_approval_celo_vote_revoke_flow(void) {
+    ux_flow_init(0, ux_approval_celo_vote_revoke_flow, NULL);
+}
+
+void ui_approval_celo_activate_flow(void) {
+    ux_flow_init(0, ux_approval_celo_activate_flow, NULL);
+}
+
+void ui_approval_celo_relock_flow(void) {
+    ux_flow_init(0, ux_approval_celo_relock_flow, NULL);
+}
+
+void ui_approval_celo_create_account_flow(void) {
+    ux_flow_init(0, ux_approval_celo_create_account_flow, NULL);
+}
+
+void ui_approval_celo_data_warning_gateway_tx_flow(void) {
+    ux_flow_init(0, ux_approval_celo_data_warning_gateway_tx_flow, NULL);
+}
+
+void ui_approval_celo_gateway_tx_flow(void) {
+    ux_flow_init(0, ux_approval_celo_gateway_tx_flow, NULL);
+}
+
+void ui_approval_celo_data_warning_tx_flow(void) {
+    ux_flow_init(0, ux_approval_celo_data_warning_tx_flow, NULL);
+}
+
+void ui_approval_celo_tx_flow(void) {
+    ux_flow_init(0, ux_approval_celo_tx_flow, NULL);
+}
+#endif // HAVE_BAGL
diff --git a/src/ui_common.c b/src/ui_common.c
index 5e5c5c0..349a9da 100644
--- a/src/ui_common.c
+++ b/src/ui_common.c
@@ -5,8 +5,13 @@
 #include "globals.h"
 #include "utils.h"
 
-unsigned int io_seproxyhal_touch_data_ok(const bagl_element_t *e) {
-    UNUSED(e);
+#ifdef HAVE_NBGL
+nbgl_layoutTagValue_t tagValuePair[5];
+nbgl_layoutTagValueList_t tagValueList;
+nbgl_pageInfoLongPress_t infoLongPress;
+#endif // HAVE_NBGL
+
+unsigned int io_seproxyhal_touch_data_ok(void) {
     parserStatus_e txResult = USTREAM_FINISHED;
     txResult = continueTx(&txContext);
     switch (txResult) {
@@ -16,18 +21,24 @@ unsigned int io_seproxyhal_touch_data_ok(const bagl_element_t *e) {
         break;
     case USTREAM_PROCESSING:
         io_seproxyhal_send_status(0x9000);
+#ifdef HAVE_BAGL
         ui_idle();
+#endif // HAVE_BAGL
         break;
     case USTREAM_FAULT:
         reset_app_context();
         io_seproxyhal_send_status(0x6A80);
+#ifdef HAVE_BAGL
         ui_idle();
+#endif // HAVE_BAGL
         break;
     default:
         PRINTF("Unexpected parser status\n");
         reset_app_context();
         io_seproxyhal_send_status(0x6A80);
+#ifdef HAVE_BAGL
         ui_idle();
+#endif // HAVE_BAGL
     }
 
     if (txResult == USTREAM_FINISHED) {
@@ -37,42 +48,44 @@ unsigned int io_seproxyhal_touch_data_ok(const bagl_element_t *e) {
     return 0;
 }
 
-unsigned int io_seproxyhal_touch_data_cancel(const bagl_element_t *e) {
-    UNUSED(e);
+unsigned int io_seproxyhal_touch_data_cancel(void) {
     reset_app_context();
     io_seproxyhal_send_status(0x6985);
+#ifdef HAVE_BAGL
     // Display back the original UX
     ui_idle();
+#endif // HAVE_BAGL
     return 0; // do not redraw the widget
 }
 
-unsigned int io_seproxyhal_touch_address_ok(const bagl_element_t *e) {
-    UNUSED(e);
+unsigned int io_seproxyhal_touch_address_ok(void) {
     uint32_t tx = set_result_get_publicKey();
     G_io_apdu_buffer[tx++] = 0x90;
     G_io_apdu_buffer[tx++] = 0x00;
     reset_app_context();
     // Send back the response, do not restart the event loop
     io_exchange(CHANNEL_APDU | IO_RETURN_AFTER_TX, tx);
+#ifdef HAVE_BAGL
     // Display back the original UX
     ui_idle();
+#endif // HAVE_BAGL
     return 0; // do not redraw the widget
 }
 
-unsigned int io_seproxyhal_touch_address_cancel(const bagl_element_t *e) {
-    UNUSED(e);
+unsigned int io_seproxyhal_touch_address_cancel(void) {
     G_io_apdu_buffer[0] = 0x69;
     G_io_apdu_buffer[1] = 0x85;
     reset_app_context();
     // Send back the response, do not restart the event loop
     io_exchange(CHANNEL_APDU | IO_RETURN_AFTER_TX, 2);
+#ifdef HAVE_BAGL
     // Display back the original UX
     ui_idle();
+#endif // HAVE_BAGL
     return 0; // do not redraw the widget
 }
 
-unsigned int io_seproxyhal_touch_tx_ok(const bagl_element_t *e) {
-    UNUSED(e);
+unsigned int io_seproxyhal_touch_tx_ok(void) {
     uint8_t privateKeyData[32];
     uint8_t signature[100];
     cx_ecfp_private_key_t privateKey;
@@ -114,25 +127,27 @@ unsigned int io_seproxyhal_touch_tx_ok(const bagl_element_t *e) {
     reset_app_context();
     // Send back the response, do not restart the event loop
     io_exchange(CHANNEL_APDU | IO_RETURN_AFTER_TX, tx);
+#ifdef HAVE_BAGL
     // Display back the original UX
     ui_idle();
+#endif // HAVE_BAGL
     return 0; // do not redraw the widget
 }
 
-unsigned int io_seproxyhal_touch_tx_cancel(const bagl_element_t *e) {
-    UNUSED(e);
+unsigned int io_seproxyhal_touch_tx_cancel(void) {
     reset_app_context();
     G_io_apdu_buffer[0] = 0x69;
     G_io_apdu_buffer[1] = 0x85;
     // Send back the response, do not restart the event loop
     io_exchange(CHANNEL_APDU | IO_RETURN_AFTER_TX, 2);
+#ifdef HAVE_BAGL
     // Display back the original UX
     ui_idle();
+#endif // HAVE_BAGL
     return 0; // do not redraw the widget
 }
 
-unsigned int io_seproxyhal_touch_signMessage_ok(const bagl_element_t *e) {
-    UNUSED(e);
+unsigned int io_seproxyhal_touch_signMessage_ok(void) {
     uint8_t privateKeyData[32];
     uint8_t signature[100];
     cx_ecfp_private_key_t privateKey;
@@ -164,19 +179,22 @@ unsigned int io_seproxyhal_touch_signMessage_ok(const bagl_element_t *e) {
     reset_app_context();
     // Send back the response, do not restart the event loop
     io_exchange(CHANNEL_APDU | IO_RETURN_AFTER_TX, tx);
+#ifdef HAVE_BAGL
     // Display back the original UX
     ui_idle();
+#endif // HAVE_BAGL
     return 0; // do not redraw the widget
 }
 
-unsigned int io_seproxyhal_touch_signMessage_cancel(const bagl_element_t *e) {
-    UNUSED(e);
+unsigned int io_seproxyhal_touch_signMessage_cancel(void) {
     reset_app_context();
     G_io_apdu_buffer[0] = 0x69;
     G_io_apdu_buffer[1] = 0x85;
     // Send back the response, do not restart the event loop
     io_exchange(CHANNEL_APDU | IO_RETURN_AFTER_TX, 2);
+#ifdef HAVE_BAGL
     // Display back the original UX
     ui_idle();
+#endif // HAVE_BAGL
     return 0; // do not redraw the widget
 }
diff --git a/src/ui_common.h b/src/ui_common.h
index a3b7564..200d707 100644
--- a/src/ui_common.h
+++ b/src/ui_common.h
@@ -4,16 +4,38 @@
 
 #include "ux.h"
 
+#ifdef HAVE_NBGL
+#include "nbgl_use_case.h"
+
+extern nbgl_layoutTagValue_t tagValuePair[5];
+extern nbgl_layoutTagValueList_t tagValueList;
+extern nbgl_pageInfoLongPress_t infoLongPress;
+#endif // HAVE_NBGL
+
 void ui_idle(void);  // must be implemented by each ui handler
+void ui_display_public_flow(void); 
+void ui_display_sign_flow(void); 
+void ui_confirm_selector_flow(void);
+void ui_confirm_parameter_flow(void);
+void ui_approval_celo_lock_unlock_flow(void);
+void ui_approval_celo_withdraw_flow(void);
+void ui_approval_celo_vote_revoke_flow(void);
+void ui_approval_celo_activate_flow(void);
+void ui_approval_celo_relock_flow(void);
+void ui_approval_celo_create_account_flow(void);
+void ui_approval_celo_data_warning_gateway_tx_flow(void);
+void ui_approval_celo_gateway_tx_flow(void);
+void ui_approval_celo_data_warning_tx_flow(void);
+void ui_approval_celo_tx_flow(void);
 
-unsigned int io_seproxyhal_touch_data_ok(const bagl_element_t *e);
-unsigned int io_seproxyhal_touch_data_cancel(const bagl_element_t *e);
+unsigned int io_seproxyhal_touch_data_ok(void);
+unsigned int io_seproxyhal_touch_data_cancel(void);
 
-unsigned int io_seproxyhal_touch_address_ok(const bagl_element_t *e);
-unsigned int io_seproxyhal_touch_address_cancel(const bagl_element_t *e);
+unsigned int io_seproxyhal_touch_address_ok(void);
+unsigned int io_seproxyhal_touch_address_cancel(void);
 
-unsigned int io_seproxyhal_touch_tx_ok(const bagl_element_t *e);
-unsigned int io_seproxyhal_touch_tx_cancel(const bagl_element_t *e);
+unsigned int io_seproxyhal_touch_tx_ok(void);
+unsigned int io_seproxyhal_touch_tx_cancel(void);
 
-unsigned int io_seproxyhal_touch_signMessage_ok(const bagl_element_t *e);
-unsigned int io_seproxyhal_touch_signMessage_cancel(const bagl_element_t *e);
+unsigned int io_seproxyhal_touch_signMessage_ok(void);
+unsigned int io_seproxyhal_touch_signMessage_cancel(void);
diff --git a/src/ui_confirm_selector_nbgl.c b/src/ui_confirm_selector_nbgl.c
new file mode 100644
index 0000000..9b6279c
--- /dev/null
+++ b/src/ui_confirm_selector_nbgl.c
@@ -0,0 +1,57 @@
+#ifdef HAVE_NBGL
+#include "globals.h"
+#include "ui_common.h"
+#include "nbgl_use_case.h"
+#include "bolos_target.h"
+
+static void rejectCallback(void) {
+    io_seproxyhal_touch_data_cancel();
+}
+
+static void approveCallback(void) {
+    io_seproxyhal_touch_data_ok();
+}
+
+static void confirmationCallback(bool confirm) {
+    if (confirm) {
+        nbgl_useCaseStatus("SELECTOR\nAPPROVED", true, ui_idle);
+        approveCallback();
+    }
+    else {
+        nbgl_useCaseStatus("Selector rejected", false, ui_idle);
+        rejectCallback();
+    }
+}
+
+static void continueCallback(void) {
+    tagValueList.pairs = tagValuePair;
+    tagValueList.smallCaseForValue = false;
+
+    infoLongPress.text = "Approve selector";
+    infoLongPress.icon = &C_celo_64px;
+    infoLongPress.longPressText = "Hold to sign";
+    infoLongPress.longPressToken = 0;
+    infoLongPress.tuneId = TUNE_TAP_CASUAL;
+
+    nbgl_useCaseStaticReview(&tagValueList, &infoLongPress, "Cancel", confirmationCallback);
+}
+
+void ui_confirm_selector_flow(void) {
+    tagValuePair[0].item = "Selector";
+    tagValuePair[0].value = (char*)strings.tmp.tmp;
+
+    tagValueList.nbPairs = 1;
+
+    nbgl_useCaseReviewStart(&C_celo_64px, "Verify selector", "", "Cancel", continueCallback, rejectCallback);
+}
+
+void ui_confirm_parameter_flow(void) {
+    tagValuePair[0].item = "Parameter";
+    tagValuePair[0].value = (char*)strings.tmp.tmp;
+
+    tagValueList.nbPairs = 1;
+
+    nbgl_useCaseReviewStart(&C_celo_64px, "Verify", strings.tmp.tmp2, "Cancel", continueCallback, rejectCallback);
+}
+
+#endif // HAVE_NBGL
diff --git a/src/ui_display_public_nbgl.c b/src/ui_display_public_nbgl.c
new file mode 100644
index 0000000..814535c
--- /dev/null
+++ b/src/ui_display_public_nbgl.c
@@ -0,0 +1,34 @@
+#ifdef HAVE_NBGL
+#include "globals.h"
+#include "ui_common.h"
+#include "bolos_target.h"
+
+static void address_cancel(void) {
+    nbgl_useCaseStatus("Address rejected", false, ui_idle);
+    io_seproxyhal_touch_address_cancel();
+}
+
+static void address_confirmation(bool confirm) {
+    if (confirm) {
+        nbgl_useCaseStatus("ADDRESS\nAPPROVED", true, ui_idle);
+        io_seproxyhal_touch_address_ok();
+    }
+    else {
+        address_cancel();
+    }
+}
+
+static void address_display(void) {
+    nbgl_useCaseAddressConfirmation(strings.common.fullAddress, address_confirmation);
+}
+
+void ui_display_public_flow(void) {
+    nbgl_useCaseReviewStart(&C_celo_64px,
+                            "Verify Celo\naddress",
+                            "",
+                            "Cancel",
+                            address_display,
+                            address_cancel);
+}
+
+#endif // HAVE_NBGL
diff --git a/src/ui_flow.c b/src/ui_flow.c
index 84a3662..c0c3743 100644
--- a/src/ui_flow.c
+++ b/src/ui_flow.c
@@ -1,11 +1,9 @@
+#ifdef HAVE_BAGL
 #include "bolos_target.h"
 
 #include "ui_flow.h"
 #include "globals.h"
 
-ux_state_t G_ux;
-bolos_ux_params_t G_ux_params;
-
 void ui_idle(void) {
     // reserve a display stack slot if none yet
     if(G_ux.stack_count == 0) {
@@ -175,7 +173,7 @@ UX_STEP_NOCB(
 UX_STEP_CB(
     ux_display_public_flow_3_step,
     pb,
-    io_seproxyhal_touch_address_ok(NULL),
+    io_seproxyhal_touch_address_ok(),
     {
       &C_icon_validate_14,
       "Approve",
@@ -183,7 +181,7 @@ UX_STEP_CB(
 UX_STEP_CB(
     ux_display_public_flow_4_step,
     pb,
-    io_seproxyhal_touch_address_cancel(NULL),
+    io_seproxyhal_touch_address_cancel(),
     {
       &C_icon_crossmark,
       "Reject",
@@ -216,7 +214,7 @@ UX_STEP_NOCB(
 UX_STEP_CB(
     ux_confirm_selector_flow_3_step,
     pb,
-    io_seproxyhal_touch_data_ok(NULL),
+    io_seproxyhal_touch_data_ok(),
     {
       &C_icon_validate_14,
       "Approve",
@@ -224,7 +222,7 @@ UX_STEP_CB(
 UX_STEP_CB(
     ux_confirm_selector_flow_4_step,
     pb,
-    io_seproxyhal_touch_data_cancel(NULL),
+    io_seproxyhal_touch_data_cancel(),
     {
       &C_icon_crossmark,
       "Reject",
@@ -258,7 +256,7 @@ UX_STEP_NOCB(
 UX_STEP_CB(
     ux_confirm_parameter_flow_3_step,
     pb,
-    io_seproxyhal_touch_data_ok(NULL),
+    io_seproxyhal_touch_data_ok(),
     {
       &C_icon_validate_14,
       "Approve",
@@ -267,7 +265,7 @@ UX_STEP_CB(
 UX_STEP_CB(
     ux_confirm_parameter_flow_4_step,
     pb,
-    io_seproxyhal_touch_data_cancel(NULL),
+    io_seproxyhal_touch_data_cancel(),
     {
       &C_icon_crossmark,
       "Reject",
@@ -348,7 +346,7 @@ UX_STEP_NOCB(
 UX_STEP_CB(
     ux_approval_tx_5_step,
     pbb,
-    io_seproxyhal_touch_tx_ok(NULL),
+    io_seproxyhal_touch_tx_ok(),
     {
       &C_icon_validate_14,
       "Accept",
@@ -357,7 +355,7 @@ UX_STEP_CB(
 UX_STEP_CB(
     ux_approval_tx_6_step,
     pb,
-    io_seproxyhal_touch_tx_cancel(NULL),
+    io_seproxyhal_touch_tx_cancel(),
     {
       &C_icon_crossmark,
       "Reject",
@@ -487,7 +485,7 @@ UX_STEP_NOCB(
 UX_STEP_CB(
     ux_sign_flow_3_step,
     pbb,
-    io_seproxyhal_touch_signMessage_ok(NULL),
+    io_seproxyhal_touch_signMessage_ok(),
     {
       &C_icon_validate_14,
       "Sign",
@@ -497,7 +495,7 @@ UX_STEP_CB(
 UX_STEP_CB(
     ux_sign_flow_4_step,
     pbb,
-    io_seproxyhal_touch_signMessage_cancel(NULL),
+    io_seproxyhal_touch_signMessage_cancel(),
     {
       &C_icon_crossmark,
       "Cancel",
@@ -510,3 +508,4 @@ UX_FLOW(ux_sign_flow,
   &ux_sign_flow_3_step,
   &ux_sign_flow_4_step
 );
+#endif // HAVE_BAGL
diff --git a/src/ui_settings_nbgl.c b/src/ui_settings_nbgl.c
new file mode 100644
index 0000000..ea9aa3c
--- /dev/null
+++ b/src/ui_settings_nbgl.c
@@ -0,0 +1,106 @@
+#ifdef HAVE_NBGL
+#include "globals.h"
+#include "ui_common.h"
+#include "nbgl_use_case.h"
+#include "bolos_target.h"
+
+#define NB_INFO_FIELDS 2
+#define PAGE_START 0
+#define NB_PAGE_SETTING 2
+#define IS_TOUCHABLE false
+
+// Forward declaration
+static void displaySettingsMenu(void);
+static void settingsControlsCallback(int token, uint8_t index);
+static bool settingsNavCallback(uint8_t page, nbgl_pageContent_t *content);
+
+enum {
+    SWITCH_CONTRACT_DATA_SET_TOKEN = FIRST_USER_TOKEN,
+    SWITCH_DEBUG_DATA_SET_TOKEN,
+    NB_SETTINGS_SWITCHES,
+};
+
+static nbgl_layoutSwitch_t switches[NB_SETTINGS_SWITCHES - FIRST_USER_TOKEN];
+
+static const char* const infoTypes[] = {"Version", "Celo App"};
+static const char* const infoContents[] = {APPVERSION, "(c) 2022 Ledger"};
+
+static void onQuitCallback(void) {
+    os_sched_exit(-1);
+}
+
+static bool settingsNavCallback(uint8_t page, nbgl_pageContent_t *content) {
+    if (page == 0) {
+        content->type = INFOS_LIST;
+        content->infosList.nbInfos = NB_INFO_FIELDS;
+        content->infosList.infoTypes = (const char**) infoTypes;
+        content->infosList.infoContents = (const char**) infoContents;
+    }
+    else if (page == 1) {
+        switches[0].text = "Contract data";
+        switches[0].subText = "Allow contract data\nin transactions";
+        switches[0].token = SWITCH_CONTRACT_DATA_SET_TOKEN;
+        switches[0].tuneId = TUNE_TAP_CASUAL;
+        switches[0].initState = N_storage.dataAllowed;
+
+        switches[1].text = "Debug data";
+        switches[1].subText = "Display contract data details";
+        switches[1].token = SWITCH_DEBUG_DATA_SET_TOKEN;
+        switches[1].tuneId = TUNE_TAP_CASUAL; 
+        switches[1].initState = N_storage.contractDetails;
+
+        content->type = SWITCHES_LIST;
+        content->switchesList.nbSwitches = NB_SETTINGS_SWITCHES - FIRST_USER_TOKEN,
+        content->switchesList.switches = (nbgl_layoutSwitch_t*) switches;
+    }
+    else {
+        return false;
+    }
+    return true;
+}
+
+static void switch_settings_contract_data() {
+  uint8_t value = (N_storage.dataAllowed ? 0 : 1);
+  nvm_write(&N_storage.dataAllowed, (void*)&value, sizeof(uint8_t));
+}
+
+static void switch_settings_display_data() {
+  uint8_t value = (N_storage.contractDetails ? 0 : 1);
+  nvm_write(&N_storage.contractDetails, (void*)&value, sizeof(uint8_t));
+}
+
+static void settingsControlsCallback(int token, uint8_t index) {
+    UNUSED(index);
+    switch(token)
+    {
+        case SWITCH_CONTRACT_DATA_SET_TOKEN:
+            switch_settings_contract_data();
+            break;   
+
+        case SWITCH_DEBUG_DATA_SET_TOKEN:
+            switch_settings_display_data();
+            break;
+
+        default:
+            PRINTF("Should not happen !");
+            break;
+    }
+
+    switches[0].initState = N_storage.dataAllowed;
+    switches[1].initState = N_storage.contractDetails;
+
+    displaySettingsMenu();
+}
+
+static void displaySettingsMenu(void) {
+    nbgl_useCaseSettings("Celo settings", PAGE_START, NB_PAGE_SETTING, IS_TOUCHABLE, ui_idle, 
+            settingsNavCallback, settingsControlsCallback);
+}
+
+void ui_idle(void) {
+    nbgl_useCaseHome("Celo", &C_celo_64px, 
+            NULL, true, 
+            displaySettingsMenu, onQuitCallback);
+}
+
+#endif // HAVE_NBGL
diff --git a/src/ui_sign_nbgl.c b/src/ui_sign_nbgl.c
new file mode 100644
index 0000000..7d16d78
--- /dev/null
+++ b/src/ui_sign_nbgl.c
@@ -0,0 +1,47 @@
+#ifdef HAVE_NBGL
+#include "globals.h"
+#include "ui_common.h"
+#include "nbgl_use_case.h"
+#include "bolos_target.h"
+
+static void sign_cancel(void) {
+    nbgl_useCaseStatus("Message rejected", false, ui_idle);
+    io_seproxyhal_touch_signMessage_cancel();
+}
+
+static void sign_confirmation(bool confirm) {
+    if (confirm) {
+        nbgl_useCaseStatus("MESSAGE\nAPPROVED", true, ui_idle);
+        io_seproxyhal_touch_signMessage_ok();
+    }
+    else {
+        sign_cancel();
+    }
+}
+
+static void sign_display(void) {
+    tagValuePair[0].item = "Message hash";
+    tagValuePair[0].value = (char*)strings.common.fullAddress;
+
+    tagValueList.nbPairs = 1;
+    tagValueList.pairs = tagValuePair;
+    tagValueList.smallCaseForValue = false;
+
+    infoLongPress.text = "Sign message";
+    infoLongPress.icon = &C_celo_64px;
+    infoLongPress.longPressText = "Hold to sign";
+    infoLongPress.longPressToken = 0;
+    infoLongPress.tuneId = TUNE_TAP_CASUAL;
+
+    nbgl_useCaseStaticReview(&tagValueList, &infoLongPress, "Cancel", sign_confirmation);
+}
+
+void ui_display_sign_flow(void) {
+    nbgl_useCaseReviewStart(&C_celo_64px,
+                            "Review message",
+                            "",
+                            "Cancel",
+                            sign_display,
+                            sign_cancel);
+}
+#endif // HAVE_NBGL
diff --git a/src/ui_tx_nbgl.c b/src/ui_tx_nbgl.c
new file mode 100644
index 0000000..c26222a
--- /dev/null
+++ b/src/ui_tx_nbgl.c
@@ -0,0 +1,176 @@
+#ifdef HAVE_NBGL
+#include "globals.h"
+#include "ui_common.h"
+#include "nbgl_use_case.h"
+#include "bolos_target.h"
+
+static void rejectCallback(void) {
+    io_seproxyhal_touch_tx_cancel();
+}
+
+static void approveCallback(void) {
+    io_seproxyhal_touch_tx_ok();
+}
+
+static void confirmationCallback(bool confirm) {
+    if (confirm) {
+        nbgl_useCaseStatus("TRANSACTION\nAPPROVED", true, ui_idle);
+        approveCallback();
+    }
+    else {
+        nbgl_useCaseStatus("Transaction rejected", false, ui_idle);
+        rejectCallback();
+    }
+}
+
+static void continueCallback(void) {
+    tagValueList.pairs = tagValuePair;
+
+    infoLongPress.text = "Approve Transaction";
+    infoLongPress.icon = &C_celo_64px;
+    infoLongPress.longPressText = "Hold to sign";
+    infoLongPress.longPressToken = 0;
+    infoLongPress.tuneId = TUNE_TAP_CASUAL;
+
+    nbgl_useCaseStaticReview(&tagValueList, &infoLongPress, "Cancel", confirmationCallback);
+}
+
+static void warningCallback(void) {
+    nbgl_useCaseReviewStart(&C_warning64px, "WARNING", "Data present", "Cancel", continueCallback, rejectCallback);
+}
+
+static void fill_data_tx(void) {
+    tagValuePair[0].item = "Amount";
+    tagValuePair[0].value = (char*)strings.common.fullAmount;
+
+    tagValuePair[1].item = "Address";
+    tagValuePair[1].value = (char*)strings.common.fullAddress;
+
+    tagValuePair[2].item = "Max Fees";
+    tagValuePair[2].value = (char*)strings.common.maxFee;
+
+    tagValueList.nbPairs = 3;
+}
+
+static void fill_gateway_tx(void) {
+    tagValuePair[0].item = "Amount";
+    tagValuePair[0].value = (char*)strings.common.fullAmount;
+
+    tagValuePair[1].item = "Address";
+    tagValuePair[1].value = (char*)strings.common.fullAddress;
+
+    tagValuePair[2].item = "Max Fees";
+    tagValuePair[2].value = (char*)strings.common.maxFee;
+
+    tagValuePair[3].item = "Gateway Fee";
+    tagValuePair[3].value = (char*)strings.common.gatewayFee;
+
+    tagValuePair[4].item = "Gateway Address";
+    tagValuePair[4].value = (char*)strings.common.fullGatewayAddress;
+
+    tagValueList.nbPairs = 5;
+}
+
+static void fill_lock_relock(void) {
+    tagValuePair[0].item = "Type";
+    tagValuePair[0].value = (char*)strings.common.stakingType;
+
+    tagValuePair[1].item = "Amount";
+    tagValuePair[1].value = (char*)strings.common.fullAmount;
+
+    tagValuePair[2].item = "Max Fees";
+    tagValuePair[2].value = (char*)strings.common.maxFee;
+
+    tagValueList.nbPairs = 3;
+}
+
+static void fill_withdraw_or_create_account(void) {
+    tagValuePair[0].item = "Type";
+    tagValuePair[0].value = (char*)strings.common.stakingType;
+
+    tagValuePair[1].item = "Max Fees";
+    tagValuePair[1].value = (char*)strings.common.maxFee;
+
+    tagValueList.nbPairs = 2;
+}
+
+static void fill_activate(void) {
+    tagValuePair[0].item = "Type";
+    tagValuePair[0].value = (char*)strings.common.stakingType;
+
+    tagValuePair[1].item = "Validator";
+    tagValuePair[1].value = (char*)strings.common.fullAddress;
+
+    tagValuePair[2].item = "Max Fees";
+    tagValuePair[2].value = (char*)strings.common.maxFee;
+
+    tagValueList.nbPairs = 3;
+}
+
+static void fill_vote_revoke(void) {
+    tagValuePair[0].item = "Type";
+    tagValuePair[0].value = (char*)strings.common.stakingType;
+
+    tagValuePair[1].item = "Amount";
+    tagValuePair[1].value = (char*)strings.common.fullAmount;
+
+    tagValuePair[2].item = "Validator";
+    tagValuePair[2].value = (char*)strings.common.fullAddress;
+
+    tagValuePair[3].item = "Max Fees";
+    tagValuePair[3].value = (char*)strings.common.maxFee;
+
+    tagValueList.nbPairs = 4;
+}
+
+void ui_approval_celo_tx_flow(void) {
+    fill_data_tx();
+    nbgl_useCaseReviewStart(&C_celo_64px, "Review transaction", "", "Cancel", continueCallback, rejectCallback);
+}
+
+void ui_approval_celo_data_warning_tx_flow(void) {
+    fill_data_tx();
+    nbgl_useCaseReviewStart(&C_celo_64px, "Review transaction", "", "Cancel", warningCallback, rejectCallback);
+}
+
+void ui_approval_celo_gateway_tx_flow(void) {
+    fill_gateway_tx();
+    nbgl_useCaseReviewStart(&C_celo_64px, "Review transaction", "", "Cancel", continueCallback, rejectCallback);
+}
+
+void ui_approval_celo_data_warning_gateway_tx_flow(void) {
+    fill_gateway_tx();
+    nbgl_useCaseReviewStart(&C_celo_64px, "Review transaction", "", "Cancel", warningCallback, rejectCallback);
+}
+
+void ui_approval_celo_lock_unlock_flow(void) {
+    fill_lock_relock();
+    nbgl_useCaseReviewStart(&C_celo_64px, "Review transaction", "", "Cancel", continueCallback, rejectCallback);
+}
+
+void ui_approval_celo_relock_flow(void) {
+    fill_lock_relock();
+    nbgl_useCaseReviewStart(&C_celo_64px, "Review transaction", "", "Cancel", continueCallback, rejectCallback);
+}
+
+void ui_approval_celo_withdraw_flow(void) {
+    fill_withdraw_or_create_account();
+    nbgl_useCaseReviewStart(&C_celo_64px, "Review transaction", "", "Cancel", continueCallback, rejectCallback);
+}
+
+void ui_approval_celo_create_account_flow(void) {
+    fill_withdraw_or_create_account();
+    nbgl_useCaseReviewStart(&C_celo_64px, "Review transaction", "", "Cancel", continueCallback, rejectCallback);
+}
+
+void ui_approval_celo_activate_flow(void) {
+    fill_activate();
+    nbgl_useCaseReviewStart(&C_celo_64px, "Review transaction", "", "Cancel", continueCallback, rejectCallback);
+}
+
+void ui_approval_celo_vote_revoke_flow(void) {
+    fill_vote_revoke();
+    nbgl_useCaseReviewStart(&C_celo_64px, "Review transaction", "", "Cancel", continueCallback, rejectCallback);
+}
+
+#endif // HAVE_NBGL
diff --git a/stax_app_celo.gif b/stax_app_celo.gif
new file mode 100644
index 0000000..ee155bb
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diff --git a/tests/python/__init__.py b/tests/python/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/python/apps/__init__.py b/tests/python/apps/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/python/apps/celo.py b/tests/python/apps/celo.py
new file mode 100644
index 0000000..04d3602
--- /dev/null
+++ b/tests/python/apps/celo.py
@@ -0,0 +1,93 @@
+from typing import List, Generator
+from enum import IntEnum
+from contextlib import contextmanager
+
+from ragger.backend.interface import BackendInterface, RAPDU
+
+from .celo_cmd_builder import *
+import rlp
+
+
+class INS(IntEnum):
+    INS_GET_PUBLIC_KEY = 0x02
+    INS_SIGN = 0x04
+    INS_GET_APP_CONFIGURATION = 0x06
+    INS_SIGN_PERSONAL_MESSAGE = 0x08
+    INS_PROVIDE_ERC20_TOKEN_INFORMATION = 0x0A
+    INS_GET_APP_TYPE = 0x0C
+
+CLA = 0xE0
+
+MAX_CHUNK_SIZE = 255
+
+
+class StatusCode(IntEnum):
+    STATUS_OK = 0x9000
+
+
+class Param(IntEnum):
+    P1_DirectlyFetchAddress     = 0x00 # Return address directly from the wallet
+    P1_ShowFetchAddress         = 0x01 # Return address from the wallet after showing it 
+    P1_InitTransactionData      = 0x00 # First transaction data block for signing
+    P1_ContTransactionData      = 0x80 # Subsequent transaction data block for signing
+    P2_DiscardAddressChainCode  = 0x00 # Do not return the chain code along with the address
+    P1_UNUSED                   = 0x00 # Default value
+    P2_UNUSED                   = 0x00 # Default value
+
+
+class CeloClient:
+    backend: BackendInterface
+
+    def __init__(self, backend):
+        self._client = backend
+
+
+    def get_version(self) -> bytes:
+        version: RAPDU = self._client.exchange(CLA, INS.INS_GET_APP_CONFIGURATION,
+                                                  Param.P1_UNUSED, Param.P2_UNUSED)
+        return version
+
+
+    @contextmanager
+    def send_in_chunk_async(self, instruction: int, payload: bytes) -> Generator[None, None, None]:
+        p1 = Param.P1_InitTransactionData
+        while (len(payload) > 0):
+            chunk = MAX_CHUNK_SIZE
+            if chunk > len(payload):
+                chunk = len(payload)
+
+            with self._client.exchange_async(CLA, instruction, p1, Param.P2_UNUSED, payload[:chunk]):
+                yield
+
+            payload = payload[chunk:]
+            p1 = Param.P1_ContTransactionData
+                
+
+    @contextmanager
+    def derive_address_async(self, derivation_path: bytes, show: bool, chaincode: bool) -> Generator[None, None, None]:
+        p1 = Param.P1_ShowFetchAddress if show else Param.P1_DirectlyFetchAddress
+        p2 = Param.P2_UNUSED if chaincode else Param.P2_DiscardAddressChainCode
+
+        with self._client.exchange_async(CLA, INS.INS_GET_PUBLIC_KEY, p1, p2, derivation_path):
+           yield
+
+
+    @contextmanager
+    def sign_data_async(self, derivation_path: bytes, data: str) -> Generator[None, None, None]:
+        payload: bytes = derivation_path
+        payload += len(data).to_bytes(4, byteorder='big')
+        payload += str.encode(data)
+
+        with self.send_in_chunk_async(INS.INS_SIGN_PERSONAL_MESSAGE, payload):
+            yield
+
+
+    @contextmanager
+    def sign_transaction_async(self, derivation_path : bytes, arg_list : List[str]) -> Generator[None, None, None]:
+        encoded = rlp.encode(arg_list)
+
+        payload: bytes = derivation_path
+        payload += encoded
+
+        with self.send_in_chunk_async(INS.INS_SIGN, payload):
+            yield
diff --git a/tests/python/apps/celo_cmd_builder.py b/tests/python/apps/celo_cmd_builder.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/python/apps/celo_utils.py b/tests/python/apps/celo_utils.py
new file mode 100644
index 0000000..b6d66c2
--- /dev/null
+++ b/tests/python/apps/celo_utils.py
@@ -0,0 +1,3 @@
+from ragger.bip import pack_derivation_path
+
+CELO_PACKED_DERIVATION_PATH = pack_derivation_path("m/44'/52752'/12345'")
diff --git a/tests/python/conftest.py b/tests/python/conftest.py
new file mode 100644
index 0000000..909ec8b
--- /dev/null
+++ b/tests/python/conftest.py
@@ -0,0 +1,15 @@
+from ragger.conftest import configuration
+
+###########################
+### CONFIGURATION START ###
+###########################
+
+# You can configure optional parameters by overriding the value of ragger.configuration.OPTIONAL_CONFIGURATION
+# Please refer to ragger/conftest/configuration.py for their descriptions and accepted values
+
+#########################
+### CONFIGURATION END ###
+#########################
+
+# Pull all features from the base ragger conftest using the overridden configuration
+pytest_plugins = ("ragger.conftest.base_conftest", )
diff --git a/tests/python/requirements.txt b/tests/python/requirements.txt
new file mode 100644
index 0000000..7fb8c18
--- /dev/null
+++ b/tests/python/requirements.txt
@@ -0,0 +1,4 @@
+base58
+bip32
+ragger[tests,speculos]
+rlp
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diff --git a/tests/python/test_celo.py b/tests/python/test_celo.py
new file mode 100644
index 0000000..7559ebc
--- /dev/null
+++ b/tests/python/test_celo.py
@@ -0,0 +1,62 @@
+from pathlib import Path
+
+from .apps.celo import CeloClient, StatusCode
+from .apps.celo_utils import CELO_PACKED_DERIVATION_PATH
+from .utils import get_async_response, get_nano_review_instructions, get_stax_review_instructions, get_stax_review_instructions_with_warning
+from ragger.navigator import NavInsID, NavIns
+
+import pytest
+
+TESTS_ROOT_DIR = Path(__file__).parent
+
+
+@pytest.mark.parametrize("show", [False, True])
+@pytest.mark.parametrize("chaincode", [False, True])
+def test_celo_derive_address(test_name, backend, firmware, show, chaincode, navigator): 
+    celo = CeloClient(backend)
+
+    if firmware.device == "nanos":
+        instructions = get_nano_review_instructions(4)
+    elif firmware.device.startswith("nano"):
+        instructions = get_nano_review_instructions(2)
+    else:
+        instructions = [
+            NavIns(NavInsID.USE_CASE_CHOICE_CONFIRM),
+            NavIns(NavInsID.TOUCH, (200, 335)),
+            NavIns(NavInsID.USE_CASE_ADDRESS_CONFIRMATION_EXIT_QR),
+            NavIns(NavInsID.USE_CASE_ADDRESS_CONFIRMATION_CONFIRM),
+            NavIns(NavInsID.USE_CASE_STATUS_DISMISS)
+        ]
+
+    with celo.derive_address_async(CELO_PACKED_DERIVATION_PATH, show, chaincode):
+        if show:
+            navigator.navigate_and_compare(TESTS_ROOT_DIR,
+                                           test_name,
+                                           instructions)
+
+    response: bytes = get_async_response(backend)
+
+    assert (response.status == StatusCode.STATUS_OK)
+
+
+def test_celo_get_version(backend, firmware):
+    celo = CeloClient(backend)
+    response = celo.get_version()
+
+    assert (response.status == StatusCode.STATUS_OK)
+
+
+def test_sign_data(test_name, backend, firmware, navigator):
+    celo = CeloClient(backend)
+    if firmware.device.startswith("nano"):
+        instructions = get_nano_review_instructions(2)
+    else:
+        instructions = get_stax_review_instructions(1)
+
+    with celo.sign_data_async(CELO_PACKED_DERIVATION_PATH, "1234567890"):
+        navigator.navigate_and_compare(TESTS_ROOT_DIR, test_name, instructions)
+
+    response: bytes = get_async_response(backend)
+
+    assert (response.status == StatusCode.STATUS_OK)
+    assert (len(response.data) == 65)
diff --git a/tests/python/test_sign_transaction.py b/tests/python/test_sign_transaction.py
new file mode 100644
index 0000000..49c8e1c
--- /dev/null
+++ b/tests/python/test_sign_transaction.py
@@ -0,0 +1,212 @@
+from pathlib import Path
+from .apps.celo import CeloClient, StatusCode
+from .apps.celo_utils import CELO_PACKED_DERIVATION_PATH
+from .utils import get_async_response, get_nano_review_instructions, get_stax_review_instructions, get_stax_review_instructions_with_warning
+
+TESTS_ROOT_DIR = Path(__file__).parent
+
+TOKEN_TRANSFER_ID = 0xa9059cbb
+TOKEN_TRANSFER_WITH_COMMENT_ID = 0xe1d6aceb
+LOCK_METHOD_ID = 0xf83d08ba
+VOTE_METHOD_ID = 0x580d747a
+ACTIVATE_METHOD_ID = 0x1c5a9d9c
+REVOKE_PENDING_METHOD_ID = 0x9dfb6081
+REVOKE_ACTIVE_METHOD_ID = 0x6e198475
+UNLOCK_METHOD_ID = 0x6198e339
+WITHDRAW_METHOD_ID = 0x2e1a7d4d
+RELOCK_METHOD_ID = 0xb2fb30cb
+CREATE_ACCOUNT_METHOD_ID = 0x9dca362f
+
+
+def sign_transaction(test_name, backend, navigator, instructions, payload):
+    celo = CeloClient(backend)
+    with celo.sign_transaction_async(CELO_PACKED_DERIVATION_PATH,
+            [
+                "1234",                  #Nonce
+                "1234",                  #GasPrice
+                "1234",                  #StartGas
+                "",                      #FeeCurrency
+                "12345678901234567890",  #GatewayTo
+                "1234",                  #GatewayFee 
+                "12345678901234567890",  #To
+                "",                      #Value
+                payload,
+                "",                      #V
+                "",                      #R
+                "",                      #S
+                ""                       #Done
+                ]
+            ):
+        navigator.navigate_and_compare(TESTS_ROOT_DIR, test_name, instructions)
+    response: bytes = get_async_response(backend)
+
+    assert (response.status == StatusCode.STATUS_OK)
+
+
+def sign_transaction_no_gtw(test_name, backend, navigator, instructions, payload):
+    celo = CeloClient(backend)
+    with celo.sign_transaction_async(CELO_PACKED_DERIVATION_PATH,
+            [
+                "1234",                  #Nonce
+                "1234",                  #GasPrice
+                "1234",                  #StartGas
+                "",                      #FeeCurrency
+                "",                      #GatewayTo
+                "1234",                  #GatewayFee 
+                "12345678901234567890",  #To
+                "",                      #Value
+                payload,
+                "",                      #V
+                "",                      #R
+                "",                      #S
+                ""                       #Done
+                ]
+            ):
+        navigator.navigate_and_compare(TESTS_ROOT_DIR, test_name, instructions)
+    response: bytes = get_async_response(backend)
+
+    assert (response.status == StatusCode.STATUS_OK)
+
+
+def test_sign_transaction_empty(test_name, backend, firmware, navigator):
+    if firmware.device == "nanos":
+        instructions = get_nano_review_instructions(14)
+    elif firmware.device.startswith("nano"):
+        instructions = get_nano_review_instructions(6)
+    else:
+        instructions = get_stax_review_instructions(2)
+    payload = ""
+
+    sign_transaction(test_name, backend, navigator, instructions, payload)
+
+
+def test_sign_transaction_token_transfer(test_name, backend, firmware, navigator):
+    if firmware.device == "nanos":
+        instructions = get_nano_review_instructions(15)
+    elif firmware.device.startswith("nano"):
+        instructions = get_nano_review_instructions(7)
+    else:
+        instructions = get_stax_review_instructions_with_warning(2)
+    payload = TOKEN_TRANSFER_ID.to_bytes(4, byteorder='big') + b'00' * 32
+
+    sign_transaction(test_name, backend, navigator, instructions, payload)
+
+
+def test_sign_transaction_lock(test_name, backend, firmware, navigator):
+    if firmware.device == "nanos":
+        instructions = get_nano_review_instructions(6)
+    elif firmware.device.startswith("nano"):
+        instructions = get_nano_review_instructions(4)
+    else:
+        instructions = get_stax_review_instructions(1)
+    payload = LOCK_METHOD_ID.to_bytes(4, byteorder='big')
+
+    sign_transaction(test_name, backend, navigator, instructions, payload)
+
+
+def test_sign_transaction_vote(test_name, backend, firmware, navigator):
+    if firmware.device == "nanos":
+        instructions = get_nano_review_instructions(14)
+    elif firmware.device.startswith("nano"):
+        instructions = get_nano_review_instructions(6)
+    else:
+        instructions = get_stax_review_instructions(2)
+    payload = VOTE_METHOD_ID.to_bytes(4, byteorder='big') + b'00' * 64
+
+    sign_transaction(test_name, backend, navigator, instructions, payload)
+
+
+def test_sign_transaction_activate(test_name, backend, firmware, navigator):
+    if firmware.device == "nanos":
+        instructions = get_nano_review_instructions(8)
+    elif firmware.device.startswith("nano"):
+        instructions = get_nano_review_instructions(4)
+    else:
+        instructions = get_stax_review_instructions(1)
+    payload = ACTIVATE_METHOD_ID.to_bytes(4, byteorder='big') + b'00' * 16
+
+    sign_transaction(test_name, backend, navigator, instructions, payload)
+
+
+def test_sign_transaction_revoke(test_name, backend, firmware, navigator):
+    if firmware.device == "nanos":
+        instructions = get_nano_review_instructions(14)
+    elif firmware.device.startswith("nano"):
+        instructions = get_nano_review_instructions(6)
+    else:
+        instructions = get_stax_review_instructions(2)
+    payload = REVOKE_PENDING_METHOD_ID.to_bytes(4, byteorder='big') + b'00' * 80
+
+    sign_transaction(test_name, backend, navigator, instructions, payload)
+
+
+def test_sign_transaction_unlock(test_name, backend, firmware, navigator):
+    if firmware.device == "nanos":
+        instructions = get_nano_review_instructions(11)
+    elif firmware.device.startswith("nano"):
+        instructions = get_nano_review_instructions(5)
+    else:
+        instructions = get_stax_review_instructions(2)
+    payload = UNLOCK_METHOD_ID.to_bytes(4, byteorder='big') + b'00' * 16
+
+    sign_transaction(test_name, backend, navigator, instructions, payload)
+
+
+def test_sign_transaction_withdraw(test_name, backend, firmware, navigator):
+    if firmware.device == "nanos":
+        instructions = get_nano_review_instructions(5)
+    elif firmware.device.startswith("nano"):
+        instructions = get_nano_review_instructions(3)
+    else:
+        instructions = get_stax_review_instructions(1)
+    payload = WITHDRAW_METHOD_ID.to_bytes(4, byteorder='big') + b'00' * 16
+
+    sign_transaction(test_name, backend, navigator, instructions, payload)
+
+
+def test_sign_transaction_relock(test_name, backend, firmware, navigator):
+    if firmware.device == "nanos":
+        instructions = get_nano_review_instructions(11)
+    elif firmware.device.startswith("nano"):
+        instructions = get_nano_review_instructions(5)
+    else:
+        instructions = get_stax_review_instructions(2)
+    payload = RELOCK_METHOD_ID.to_bytes(4, byteorder='big') + b'00' * 32
+
+    sign_transaction(test_name, backend, navigator, instructions, payload)
+
+
+def test_sign_transaction_create(test_name, backend, firmware, navigator):
+    if firmware.device == "nanos":
+        instructions = get_nano_review_instructions(5)
+    elif firmware.device.startswith("nano"):
+        instructions = get_nano_review_instructions(3)
+    else:
+        instructions = get_stax_review_instructions(1)
+    payload = CREATE_ACCOUNT_METHOD_ID.to_bytes(4, byteorder='big')
+
+    sign_transaction(test_name, backend, navigator, instructions, payload)
+
+
+def test_sign_transaction_no_gtw(test_name, backend, firmware, navigator):
+    if firmware.device == "nanos":
+        instructions = get_nano_review_instructions(8)
+    elif firmware.device.startswith("nano"):
+        instructions = get_nano_review_instructions(4)
+    else:
+        instructions = get_stax_review_instructions(1)
+
+    payload = ""
+    sign_transaction_no_gtw(test_name, backend, navigator, instructions, payload)
+
+
+def test_sign_transaction_no_gtw2(test_name, backend, firmware, navigator):
+    if firmware.device == "nanos":
+        instructions = get_nano_review_instructions(9)
+    elif firmware.device.startswith("nano"):
+        instructions = get_nano_review_instructions(5)
+    else:
+        instructions = get_stax_review_instructions_with_warning(1)
+
+    payload = "1234"
+    sign_transaction_no_gtw(test_name, backend, navigator, instructions, payload)
diff --git a/tests/python/utils.py b/tests/python/utils.py
new file mode 100644
index 0000000..5c6dc8b
--- /dev/null
+++ b/tests/python/utils.py
@@ -0,0 +1,50 @@
+from bip32 import HARDENED_INDEX
+
+from ragger.backend import SpeculosBackend
+from ragger.navigator import NavInsID, NavIns
+from ragger.backend.interface import RAPDU
+
+
+def get_nano_review_instructions(num_screen_skip):
+    instructions = [NavIns(NavInsID.RIGHT_CLICK)] * num_screen_skip
+    instructions.append(NavIns(NavInsID.BOTH_CLICK))
+    return instructions
+
+
+def get_stax_review_instructions(num_screen_skip):
+    instructions = [NavIns(NavInsID.USE_CASE_CHOICE_CONFIRM)]
+
+    for i in range(num_screen_skip):
+        instructions.append(NavIns(NavInsID.USE_CASE_REVIEW_TAP))
+
+    instructions.append(NavIns(NavInsID.USE_CASE_REVIEW_CONFIRM))
+    instructions.append(NavIns(NavInsID.USE_CASE_STATUS_DISMISS))
+    return instructions
+
+
+def get_stax_review_instructions_with_warning(num_screen_skip):
+    instructions = [NavIns(NavInsID.USE_CASE_CHOICE_CONFIRM)]
+    instructions.append(NavIns(NavInsID.USE_CASE_CHOICE_CONFIRM))
+
+    for i in range(num_screen_skip):
+        instructions.append(NavIns(NavInsID.USE_CASE_REVIEW_TAP))
+
+    instructions.append(NavIns(NavInsID.USE_CASE_REVIEW_CONFIRM))
+    instructions.append(NavIns(NavInsID.USE_CASE_STATUS_DISMISS))
+    return instructions
+
+
+def get_async_response(backend: SpeculosBackend) -> RAPDU:
+    return backend.last_async_response
+
+
+def pack_derivation_path(derivation_path: str) -> bytes:
+    split = derivation_path.split("/")
+    assert split.pop(0) == "m", "master expected"
+    derivation_path: bytes = (len(split)).to_bytes(1, byteorder='big')
+    for i in split:
+        if (i[-1] == "'"):
+            derivation_path += (int(i[:-1]) | HARDENED_INDEX).to_bytes(4, byteorder='big')
+        else:
+            derivation_path += int(i).to_bytes(4, byteorder='big')
+    return derivation_path
diff --git a/tests/CMakeLists.txt b/tests/unit/CMakeLists.txt
similarity index 94%
rename from tests/CMakeLists.txt
rename to tests/unit/CMakeLists.txt
index 90df97d..af3b6f0 100644
--- a/tests/CMakeLists.txt
+++ b/tests/unit/CMakeLists.txt
@@ -8,7 +8,7 @@ enable_testing()
 
 add_compile_definitions(TESTING)
 
-set(COMMON_SRC "../src_common")
+set(COMMON_SRC "../../src_common")
 include_directories(${COMMON_SRC})
 
 add_executable(test_uint256
diff --git a/tests/test_tx_parser.c b/tests/unit/test_tx_parser.c
similarity index 100%
rename from tests/test_tx_parser.c
rename to tests/unit/test_tx_parser.c
diff --git a/tests/test_uint256.c b/tests/unit/test_uint256.c
similarity index 100%
rename from tests/test_uint256.c
rename to tests/unit/test_uint256.c