Crap app!!

I paid to buy this app and get coupons. I cannot use any of them and just freezes and crashes every time I try to use it. If your going to offer the option to buy the app instead of the book at least make sure it works before you offer it. I am so disappointed! I expected a lot more from this app. $20 for absolutely nothing.

Crystalduncan99 about Sutp Mobile, v1.73