LogicPicFree

Reveal the underlying hidden picture by turning on the correct pixels based on numerical clues. Provides unique features like gesture shortcuts for maximum efficiency, unlimited undo, and guess mode. Includes 4 difficulty levels and over 24 puzzles, paid version includes over 1000 puzzles. Users can create their own puzzles and submit them to the server for other users to download and solve. Internet statistics available for best times on each puzzle and best overall user.

Also known as picross, nonogram, griddler, and paint by number.