You just fill a grid with digits so that each column, each row, and each of the nine 3×3 sub-grids that compose the grid contains all of the number from 1 to 9. This app include many unique puzzles such as "animal puzzles", "color puzzles" and "text puzzles". Features: -> Fun and good looking layouts -> Simple, easy and intuitive user interface -> Difficulty options -> 4 type of games: classic, color, animal and text -> Hint function -> Support any iOS devices