Was awesome but latest version stinks

My son got Anki Overdrive for his birthday this summer and loves it. This latest update crashes on startup on his iPhone 4S which is still listed as compatible. I tried uninstalling and reinstalling but it doesnt even seem to want to install now. I am going to be really disappointed if it is no longer supported on his phone. Also you cant race others unless they are on the same version so he cant race with his sister or father now because the new version works on our phones. I hope this is a bug that gets fixed soon otherwise we wasted a bunch of money.

TexAg88 about Anki OVERDRIVE, v1.6.0