The popular social version of Angry Birds, Angry Birds Friends, is now available for Android and iOS. Now, people on all platforms, including Facebook, iOS and Android can play against each other and track scores.

Compatible with iPhone, iPod touch and iPad, Angry Birds Friends is available now in Apple's App Store and Google Play for free.

Angry Birds Friends puts a social twist to the popular birds-flinging-into-pigs game. It lets you challenge your Facebook friends, hold weekly tournaments and has a series of power-ups that aren't found in the original game. These power-ups include King Sling, Super Seeds, Birdquake or even call in the Wingman, who boosts a player to a higher score.

"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.

Weekly tournaments start Monday, May 6 and continue each Monday following. Players vie for points to win a gold, silver or bronze trophy or get more power-ups.

The new app is similar to how Rovio, the company behind the classic game, has been providing Angry Birds Friends on Facebook for a while.

Rovio also said that a new, revamped version of the original Angry Birds game will be completely free to download for the first two weeks of this month, until May 15. The game has extra 100 all-new levels and some new special powers for the feathered evil birds. The Windows Phone 8 version has Xbox Live integration, featuring leaderboards and achievements.

The new version of the original game is a separate release, not an update, so it won't wipe over the stats on the previous $2.99 game. Rovio says the new release gave the company more time to work on the basic infrastructure of the app.

"The reason why we're re-releasing the game is that it will be technically easier for us to support in the future, so we're really happy to get this out there," the company said in a statement.