A free program for Android, by Xu Solitaire Games.

This game has amazing levels that keep getting better. Additionally, this bubble shooting game is totally free. You will just need to aim and align bubbles in the direction you want the bubble to go. This will cause a group of three or more bubbles to break and advance to the next level. Then you will remove every bubble from the screen. Fewer moves required to complete a level equals a higher score.  Depending on your performance, you will receive coins at the game’s conclusion. The amount of coin you receive depends on how well you performed. To increase your score at the conclusion of the game, click the bubbles that are dropping.