Futoshiki, developed by Verschueren Geert, is a free puzzle game available for Android devices. The game is based on numbers and its name means "unequal" in Japanese. The objective of the game is to fill in all the empty fields with values ranging from 1 to the maximum number of cells in a row or column.

While playing the game, you must keep in mind the following rules: a value can only appear once in a row or column, the markers between the cells must follow valid rules (bigger or smaller), and each row or column must be unique and not repeated. The game offers grid sizes ranging from 4x4 up to 9x9 with four different difficulty levels, giving players access to a whopping 24,000 puzzles.

One useful feature of Futoshiki is the ability to backup your user code. You can access the code screen again by long-clicking the logo in the main menu and using the send button. Overall, Futoshiki is a challenging and entertaining game that will test your logic and problem-solving skills.