Android/iOS: Updating your contacts every time your friends change their info can be annoying, especially if you don't know they have changed it. Addappt, on the other hand, is a social contacts app that updates automatically.
Unlike social networks like Facebook, Addappt keeps contact info changes private. When your friends change their info, your contacts will be automatically updated. You can also use the app to send quick notifications to people you've connected with on the app.
addappt [iTunes App Store]
addappt [Google Play Store]