Pentominos presents a geometric puzzle that requires you to fit 12 pieces on a board with no overlaps or gaps. The pieces are formed by arranging 5 squares into 12 unique shapes. There are over 1000 solutions to the puzzle, but finding a solution is not trivial. Pentominos provides the following features for playing the game:
- Tap and swipe pieces to rotate and flip them to all possible orientations.
- Tap a square on the board to place a piece on the board.
- Tap a square on the board to move a placed piece to another location on the board.
- Tap a piece's home base to remove the piece from the board.
- As an option, receive feedback on your progress towards a solution.
- As an option, save your unique solutions.

For more details on using the app, see http://www.sarjosoftware.com/pentominos or check out the About page in the app itself. For historical background and other info about pentominos, see the Pentomino page in Wikipedia.