Apple he paid $2 billion to developers in the first 31 months of launch App Store, while iTunes paid $2 billion for the first 34 months of music sales. Asymco adds that the maker of the popular iPhone will soon announce the 10 billionth download of the app. If that happens this month, it would reach App Store 10 billion app downloads in 31 months (iTunes took 67 months to reach 10 billion song downloads).