Google’s Android Market has hit 3 billion installations of mobile apps worldwide, just two months after hitting 2 billion installations. Momentum is clearly growing fast; it took Google 20 months to hit its first 1 billion installs on Android, but then only another five months to hit 2 billion. And in its most recent quarter, Google’s app installs were up 50 percent compared to the previous quarter. Such growth is driven by the 350,000 daily activations of Android-based handsets (almost 2.5 million a week).

In comparison, in January Apple reported that it hit its 10 billionth download for iOS apps, compared to hitting its first billion in April 2009. It hit 5 billion in June 2010.