Why was my app removed from the store?

If your iPhone app was removed from the App Store, it's probably because your membership has expired. Apple charges $99/year and if you miss your payment, they will immediately remove your app from the store. They will send a notice 30 days before the renewal date as a reminder. To avoid that issue, it's best to enable Auto-Renew on your Apple Developer Account.

To confirm why your app was removed or to renew your membership, login to your Apple Developer Account: https://developer.apple.com/account

If your Android app was removed from the Google Play Store, it's probably because of a violation of their terms of service. Google doesn't charge a yearly fee so there won't be any payments due. To confirm why your app was removed, login to your Google Developer Account: https://play.google.com/console/u/0/developers/