I have never paid for an app, but am seriously thinking of doing so, but don't know how to go about it/procedure. Clearly it will be from the App Store and whereas those that are free, the button says "get" and you enter your password, What will happen if the app is chargeable, how does that work? Something else please, assuming I able to pay/install it, if by accident I should delete it, is it retrievable?. I know you can't press a button and it's gone, due to the shaking and "are you sure?" procedure, but if there was a way of deleting it they hadn't discovered, no doubt I would find it being slightly clumsy.