Apple (NSDQ: AAPL) said today that iPhone and iPod Touch users have downloaded more than two billion apps since the store launched in July 2008. In addition, there are now more than 85,000 apps available that were built by more than 125,000 developers in company’s developer program. Release.

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On Sept. 9, Steve Jobs took the stage in San Francisco to announce that there were 75,000 applications in the app store, and that users had downloaded 1.8 billion applications (not including updates). There are roughly 30 million iPhone users and 20 million iPod Touch owners. That means in the past 20 days, each owner has downloaded an average of four applications for a total of 200 million. In a release today, Jobs said: “The rate of App Store downloads continues to accelerate with users downloading a staggering two billion apps in just over a year, including more than half a billion apps this quarter alone.”

When Jobs took the stage earlier this month, he also announced a new service that recommends applications you may like based on ones you’ve downloaded previously. That alone could have driven a spike in downloads since merchandising is one of the biggest hurdles.  With the 3.1 software update, Apple added a new category called “Genius.” It uses the same technology that delivers song recommendations to people in iTunes, but it gives app recommendations based on what you have previously downloaded. For instance, if you liked a golf app, then maybe EA’s Madden would also appeals to you.