Trimino app for iPhone and iPad
TRIMINO is a variation on the classic Tetris, but instead of 4 blocks, its only 3. And instead of clearing rows, you clear by connecting 8 or more blocks of the same colour.
But watch out for mixing colours! If you place blocks next to each other, the placed block will mix in with the blocks nearby. If you mix too many different colours, you will get grey dead blocks that never go away.