"We all knew Firemint had sold tons of copies of Flight Control through the App Store - being that it was at the top position of the paid applications list for what seemed like an eternity - but the question was, just how many copies did they sell? Firemint decided that today was the day they would let us in on that important information, and all that can be said is… wow!
Flight Control had held the top position on the paid applications list at the U.S. App Store from March, 24 through April 25. During that period they were able to sell 587,485 copies worldwide of the popular game, but that is just for the time it was at the number one spot. Firemint estimates that Flight Control has sold over 700,000 copies to date."