Apple announced today in a short press release that it had sold 1.5 billion iPhone and iPod touch applications during the App Store’s first year of existence. You can nitpick Apple’s timing – technically the store tuned one over the weekend – but the feat is no less impressive considering it’s an improvement of 500 million since it hit the one billion downloads mark less than three months ago, on April 24.

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The appstore is probably the most revolutionaty thing in the iPhone, i think that´s the one feature that changed it all. Without the appstore the iPhone would be dead by now

It has been amazingly successful. I certainly never thought it would become as huge as it has when it was first announced. The best part about it is all the success stories of independent developers who've done really well selling apps.