In-app Purchases don't work – Guide for iOS 7 - Tips, Tricks & Secrets for iPhone, iPad & iPod Touch Review

I downloaded this app to get familiar with ios 7. I love the content that is available, but the in-app purchases don't work. I'm getting a refund.
Review by Igor KAMINSKI on Guide for iOS 7 - Tips, Tricks & Secrets for iPhone, iPad & iPod Touch.