The digital classbook is closely linked to the Sdui timetable.

The most important requirement to be able to use the digital classbook is to have a timetable integrated in the Sdui app.

It does not matter whether you are using the Sdui Timetable planner or any timetable or substitution programme. 

Since the classbook is integrated in the Sdui app, the same technical requirements apply to its use as to the Sdui app.