Not exactly true. If you send a push notification to a device using a token of an app that isn't installed anymore, the feedback service will let you know that

Not exactly true. If you send a push notification to a device using a token of an app that isn't installed anymore, the feedback service will let you know that the app isn't installed on the device anymore[0]. [0] https://developer.apple.com/library/ios/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/Chapters/CommunicatingWIthAPS.html#//apple_ref/doc/uid/TP40008194-CH101-SW3 https://developer.apple.com/library/ios/documentation/Networ...