'Angry Birds Friends' Goes Mobile

Rovio is rolling out Angry Birds Friends to iOS and Android, allowing players to compete against Facebook friends while on the go.

The apps are available for free, though the next weekly tournament doesn't begin until May 6. Once it kicks off, users can compete on mobile or Facebook, with progress synced across 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.

The Facebook version of Angry Birds Friends debuted last year and allowed players to participate in weekly tournaments, win power-ups, and gave them the ability to compete with friends.

Every Monday, a different tournament is unveiled with new challenges, and the levels aren't easy. To help navigate the game, players can use power-ups like King Sling, Super Seeds, and Birdquake, or they can call in Wingman to give them a boost on a level and earn a higher score. Users can also share their victories on Facebook and give out gifts to their fellow competitors.

Players with the best overall score among their friends earn a gold trophy, with silver and bronze for second and third place, along with power-up bundles. For competing in the tournament, users win a single power-up as a consolation prize.

If you're up to the challenge, the iOS and Android versions are available now, as is the Facebook app.

In other Angry Birds news, Rovio has launched an entirely new version of the game for Windows Phone that adds 100 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 free on the Microsoft's mobile OS until May 15 (for Windows Phone 8 and Windows Phone 7.5), and Redmond hinted that Angry Birds Rio would land on the platform "very soon."