It's out on Android, no word on iOS. I haven't had a chance to try it on my phone, but saw a breakdown on it earlier while I was at work. For Forza Horizon it acts like the map screen. Constantly updating, and you can change your GPS waypoint on it, though it seems like pausing the game and setting it in game would be more effective. If you had another person in the room with you who knew enough about the game that they could set things for you, perhaps it would be more valuable. Ymmv.