Yea, I don't know. I keep redownloading it on new devices even though I hardly use it. It's nice little app for checking cheevos, messages etc. The actual game functionality has been super limited though. I think it'll pick up this christmas though, a lot of new games this e3 were using tablet stuff more meaningful than what smartglass has attempted so far.
I may be totally wrong, had the horizon problem, and I believe it only actually does the gps stuff on windows devices. Wouldn't do the map on my galaxy s4, no bother on my laptop (windows 8).