A free app for Android, by GAMEFOX.

The puzzle game known as Picross is played all over the world. In this game, you will find a number of colored blocks that must be arranged into a specific pattern. The difficulty of the puzzle depends on how quickly you can complete the pattern. If you complete it quickly, then you can get a high score, and if you take a long time, then you will get a low score.

This game is so simple that anyone can play it, even if they do not have any previous knowledge of mathematics or logic. It is very easy to play, and the rules are very simple.