[Daniel14]

I imagine the number for Android lying significantly lower, because a) it's a lot harder to pay in the Android market and thus b) more apps are ad-supported. But I don't think you can ignore the market share trends in favor of how much money devs get on each platform today. Google is already working to get carrier billing for apps to more countries, so buying apps on android will get easier. Given the huge android userbase, it might soon be very smart to put in the extra effort of programming for Android (especially as you'd be one of the first to do so).