excerpt from chat
[Roman] I noticed that users need to sign in on every app start, is it expected behavior or login should persist between app starts?
[Tom] Login persists when I use the app
[Roman] Ah, probably I need to have some backups in my gmail account to finish set up and then sign in will persist
[Tom] correct. Does it not offer you to create a new key?
To be more precise, it should persist login after you've gone through setup. There is more than one way to go through setup, maybe you create a new key, maybe you load a backup from inbox, maybe you import a key manually. But once that's done and you see inbox, login will be persisted.