*fullversion without advertisement* Turn your phone into a cheat sheet !
You can choose between a blackscreen (that simulates your phone being off or standby) and a clock.
Now if you touch the space under the clock or anywhere on the blackscreen it will display you either a previously selected picture (e.g.: a photo of a schoolbookpage) or a text (e.g.: vocabularies) you entered.
To not get caught by the teacher it is only for a short amount of time every time you touch.
Please deactivate standby in your preferences