I've recently gotten into Hero Academy again (SK introduced me to that game a while back and I decided to re download it). It's a turn based strategy game that doesn't require IAP to win etc. It's actually great with the way it deals with IAP.
I play it on iOS. It's also on Steam, Mac App Store and the Google Play store and it's cross platform. It's a fun game and I'd love to beat, er, I mean play you guys. And it's free (on iOS, Mac App Store, and I think Play Store)!
My username so that you can challenge me is Kit-Fisto. 8)