10 Companies Getting Rich on Mobile Apps

#10: Rovio, 25 million+ mobile visitors per month

Rovio is the brand behind the cult hit Angry Birds and generates just more than 25,000 unique visitors each month. The game company is not yet a publicly traded stock — but according to recent reports, a Rovio IPO is in the works and could raise as much as $9 billion. It might need that cash to develop a second act, since the company has yet to recreate the success of Angry Birds.