Is there an Android GCM equivalent to the iOS Push Notification Feedback Service?

Question

Our webapp sends push notification requests to iOS and Android devices.

For iOS, the Apple Push Notification Service has a feedback service so you can detect which d

Answer 1

GCM will respond you with the "NotRegistered" error (assuming you use HTTP). Also, GCM has recently released for iOS, so you can use it to deliver both Android and iOS notifications.