User Should Remain Log In

Hello, when my app starts I ask user to sign-in. If true it takes you to another screen.

So, what I want is, even after the app is closed use should remained signed-in for a day. The only time when user is signed out is

  1. When user clicks Log Out Button.
  2. When day is completed.

PS:- When I press back button on home screen it takes me to start screen i.e., Log-in screen.
Where am I wrong, or what updates should I do to make this work!

You need to save the username in a stored variable rather than an app variable. Stored variables keep their value even when the app is closed.