iOS 7.1 warns users about 15-minute in-app purchase window
 

By making this small change, Apple has complied with the conditions imposed by FTC after it chose to settle a complaint against in-app purchase billing. The stories are no longer shocking: parents often find that their children have racked up hundreds of dollars worth of in-app purchases and they have to pay real money for [...]

http://vr-zone.com/articles/ios-7-1-...urchase-window