One could say that the Apple iTunes App Store is doing rather well as Apple has announced that a staggering 500 million applications have now been downloaded.
Furthermore, there are now in excess of 15000 applications available for the Apple iPhone and Apple iPod Touch at the iTunes App Store.
As far as I am aware no other applications store has that many, and certainly the Android Market is way behind in the app stakes, but no doubt as time moves on Android app will expand. There’s also RIM and now Palm entering the apps game, but for now one has to say that Apple is way ahead of the game.
Source — intomobile