Rovio Entertainment Corporation is an Android developer, who started in 2010, and thus is one of the Android pioneers. The current app portfolio contains 23 apps, most of which are games. In the Google rankings, Rovio Entertainment Corporation's apps appear in the top 100 in more than 10 countries. Some important apps are Angry Birds Classic, Angry Birds Rio, Angry Birds Seasons, Angry Birds Space, Angry Birds Star Wars, and Angry Birds 2. All of them have been installed more than 100 million times.