As many have already said, iOS doesn't handle this well. Let me spell it out for you:1. Child asks for app2. Parent enters password and download app (maybe even pokes around in the app)4. Parent hands device to child5. No additional password required for in-app purchase for 15 minutesDoes every parent understand that the child can make in-app purchases without entering a password? Many here do, I doubt the average person does.