Apple's iPod Touch, introduced in late 2007 as essentially an iPhone minus the phone part, has quietly grown to prominence as a platform for more than just music playback and is changing the landscape for mobile devices.

While Apple (NASDAQ: AAPL) has frequently discussed the App Store by mentioning both the iPhone and iPod Touch together, the iPhone has typically stolen the spotlight thanks to the dynamic effect it had on the smartphone market, where it remains one of the industry's hottest sellers. Now it seems that the iPod Touch plays a much greater role for those 100,000 App Store apps than previously believed.

Flurry, a San Francisco-based mobile analytics company, said in a blog post that of the 58 million iPhone OS devices sold worldwide through September, the iPod Touch (sometimes called "iTouch") represents 40 percent of the market, with 24 million units sold.

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