The app does not represent a government agency.

These are simple PDF timetables.
Ladispoli Cerveteri bus timetables. The app allows you to browse the timetables like a book by using the "swap" function, a horizontal swipe on your phone's screen.
When there is a change in the line, the button at the top changes the text. This may not happen immediately, but after a few seconds, or by closing and reopening the app.
The app allows you to save the selected page after closing it.
The app saves the selected page.