Detect uninstall event in phonegap app

Question

When a user installs my app I register his registration ID (android) or device token (iOS) and send push notifications that work fine. But now I want to remove the user from

Answer 1

AFAIK, you cannot know when your app is uninstalled.

For your android app, observe the response GCM returns when you send a notification. If it sends a NotRegistered message, you can remove that id from your server. Read how unregistration works

For iOS : read this Question and its answer on SO