Futoshiki (不等式, futōshiki), or More or Less, is a logic puzzle game from Japan. Its name means "inequality". It is also spelled hutosiki (using Kunrei-shiki romanization). Futoshiki was developed by Tamaki Seto in 2001.

The puzzle is played on a square grid. The objective is to place the numbers such that each row and column contains only one of each digit (similar to the Sudoku rules). Some digits may be given at the start. Inequality constraints are initially specified between some of the squares, such that one must be higher or lower than its neighbor. These constraints must be honored in order to complete the puzzle.
See: https://en.wikipedia.org/wiki/Futoshiki

Get an amazing Futoshiki experience:
● puzzle sizes: 4x4, 5x5, 6x6, 7x7
● difficulty levels: easy, normal, hard
● simple, intuitive controls
● daily challenges
● challenge others to beat your solve time
● works offline
● light and dark themes

Challenge your brain with Futoshiki anywhere, anytime!