According to research2guidance, the Android Market has seen 6 billion app downloads. At the end of August, the Android Market contained 277,252 apps, 35 percent required money to download; the average app currently generates roughly $2500 over its total time in the market, and sells at $3.13.
Games are the fastest growing category and account for nearly a quarter of all downloads. Weather and business apps make more money, however, and the report states that the profit potential of an app can be increased by 900 percent simply based of which category it occupies.
Source: GamesIndustry.biz
