I second this. Don't know how it works for iOS, but for Android it is straight-forward. And should be even more now with the new automatic backup for Android M

I second this. Don't know how it works for iOS, but for Android it is straight-forward. And should be even more now with the new automatic backup for Android M [0]. You would have people keep their data as they update devices, no need to build an API, but would lose the analytics part that you mentioned. [0] http://developer.android.com/preview/backup/index.html#overview http://developer.android.com/preview/backup/index.html#overv...