What is the "Bubble Witch Saga" app?

"Bubble Witch Saga" is a bubble-shooter game from King. On multiple levels, users aim, fire and pop bubbles to drop then into cauldrons. The game is free to play, but there are in-game items that require purchase.

"Bubble Witch Saga" can be played on Facebook or downloaded free for mobile devices. The game can be synced between devices, so progress is always current. On the iTunes Store, the game has more than 70,000 reviews, and has earned four stars out of a possible five stars, as of July 2015. Bubble Witch Saga has hundreds of levels and a leaderboard to monitor progress.