Rovio has started rolling out its Angry Birds Friends to iOS and Android platforms. The social version of the popular Angry Birds franchise is available for free for users.

The weekly tournament, however, is slated to begin May 6, after that users can play with their friends on mobile or Facebook while the progress synced on both platforms.

"Download it today to get some practice in before it all begins. And be sure to invite your Facebook friends to take part in all the fun," Rovio said in a blog post.

Every Monday, users will get to play different tournament with new challenges. Users can also take help from power-up such as King Sling, Super Seeds and Birdquake, or get Wingman to boost on a level. Moreover, they can share their scores as well victors on Facebook and send out gifts to other competing players.

Players winning the tournament get a gold trophy, while the second and third players get silver and bronze trophies respectively.

In a related news, Rovio has updated its Angry Birds game for Windows Phone, adding 100 new levels. "The reason why we're re-releasing the game is that it will be technically easier for us to support in the future," Rovio said in a separate blog post.

The game is available for free until May 15 for Windows Phone 8 and Windows Phone 7.5.