Shifter

Shifter is a shift calendar for places with four shifts that work two days, two nights and then have four days off.

You can add it to the home screen of your phone or tablet.

In Safari on iPhone or iPad:

1. Press the Share button (it is a box with an arrow pointing up)
2. Scroll through the icons in the bottom and press the one called Add to Home Screen

In Chrome on Android:

1. Press the menu button in the top right corner (the three dots)
2. In the list that appears, press Add to Home Screen