Google outlaws Android app updates that don't come from its Play store
Google has tightened the security screws on Android app developers, forbidding them to issue updates to apps available on Google Play outside of the store. From now on, if an Android app is downloaded from the Google Play store, no updates can be ...
Google bans self-updating Android apps, possibly including Facebook's
Google closes Facebook's loophole, bans non-Play Store app updates in Android
Google Bans Non-Play Store Android App Updates - Gizmodo