Have you ever used a companion app for a game?
If so which game apps do you recommend?
I honestly love the idea, the best use of it that I have experienced was with Assassins Creed Black Flag where your phone/ tablet doubled as a live map screen and fleet management page. It was amazing to simply not pause the game and check your map etc.
I think Nintendo were onto something similar with the wiiU controller but Im unsure of what games utilised it to its full potential.