I uninstalled the app the app recently due to an update on the original angry birds game. The update wanted permissions to access and read SMS data. Plus I've read the advertising is getting out of hand. This was on an Android device, so I'm not sure if it's the same for you. Worth checking...
Originally Posted by Staunchy: “If you don't have an internet connection when you start the game, you don't have ads on the Android "free" version either. ”
That's what I do...Put the phone into flight mode before you start and there are no ads. Plays great on a Galaxy screen too.