How many apps need an exit button? Just because you look around the App Store and don't see a bunch of apps with exit buttons doesn't mean it's because they ar

How many apps need an exit button? Just because you look around the App Store and don't see a bunch of apps with exit buttons doesn't mean it's because they aren't allowed. It never even crossed my mind to put an exit button in my apps because it's not a use case for my apps. I'm sure it's the same with a majority of the other apps.