I don't disgrudge people making money on 'apps'. Far from it.. however what really grinds my gears are developers charge for the app AND have in app purchases for said app. Make up your bloody mind. Either a) your app is completely free, b) it's free with in-app purchases, or c) a one-time charge. Charging for an app, then trying to milk people for more money afterwards is cheap and disrespectful. As a customer, I only download apps that are either completely free, or have a one-time charge. I refuse to download anything that tries to milk me for more money afterwards.