How to back press in one screen for all screen?

[Saezy (Farhad Stanekzay)]

Whenever you open a new screen, save the current screen name in the Tinydb. Then when back pressed, use an if elif block to check which screen name is saved and open that screen.

Regarding using vertical arrangements as screens, see tip 1 here:

General Tips and Tricks for App Inventor/Kodular

Use different screens wisely Before starting to create another screen, first you should think about is it really necessary? See also Building apps with many screens and SteveJG’s post about advantages/disadvantages, because in only one screen you also can use vertical arrangements to simulate different screens, just set the arrangements to visible = true/false as needed… If you decided to use different screens, then you should switch them correctly, else you will run out of memory after a wh…