Application state save/restore

Question

I want to know if application state save/restore is mandatory or optional in order to get application approved for App Store?

Answer 1

It's not mandatory, although they might possibly complain that you app doesn't provide sufficient user experience to be published on AppStore. But don't worry, this is very unlikely.

Answer 2

No, it's not. You can see the AppStore guidelines, as long as your app fall with these guidelines you should be ok.