Apple may have made just $45 million from iPhone App Store

Lightspeed Venture Partners' Jeremy Liew made the calculation after learning that there's typically a ratio of 15 to 40 free apps for every one paid example and after discovering an O'Reilly estimate which determines that the mean price for an app is about $2.65.

At the time Apple crossed the billion app mark, this would have resulted in about 25 million to 50 million downloaded paid apps and produced raw revenue of between $70 million to $160 million. But because Apple only takes 30 percent of that revenue for itself, the company has only earned $20 million to $45 million itself. That could be cut in half again if the weighted average is actually at a lower figure such as $1.50, Liew says.

The calculation would have App Store purchases account for an extremely small fraction of Apple's iPhone revenue to date; if it were put up against Apple's early 2009 revenue alone, it would represent less than 3 percent.

Still, the Cupertino-based firm is unlikely to be concerned with the exact amount of income attached to its mobile software store. Similar to its stance on the iTunes music and movie stores, Apple has maintained that the App Store isn't meant as a profit generator and is instead a means of attracting customers to the iPhone and iPod touch, where the majority of the profit exists. The reasoning is most evident in Apple's recent, app-centric marketing campaign as well as in the billion-app contest itself, which gave the prize to a downloader of Bump, a free data exchange app.