Require password to exit app How do I make my Android tablet ask for a password when I try to exit a specific application? There should be no way to exit the application without giving the password.
If your tablet is running Android 5.0+, you can activate "Screen Pinning" for a specific app and enable "Ask for PIN before unpinning" when activating it so that you have to unlock your phone before leaving the app.

Screen Pinning can be found in the Security Settings of Android.