If you've used the app on Android, there won't be many surprises from the iOS version, aside from not being able to connect via Bluetooth. So long as you're on the same WiFi network as your Android TV, the app will let your iOS device control it via touch or voice command. While this now lets you use your iPhone to play games, it will probably mostly be used to type in passwords and searches. This should be a blessing for anyone who's ever agonizingly typed on an onscreen keyboard using a handheld remote's directional pad.