SUDOKU.Studio app for iPhone and iPad

Regardless of whether you are a beginner or an expert at Sudoku, you will be able to select a difficulty that best suits your skill level.

The “Hint” function is available on all Sudoku puzzles whenever you get stuck.


All Sudoku puzzles can be solved logically. There are no puzzles that require using proof by reduction to solve.
In addition, as you can input numbers by either selecting the cell first or the number first, you will be able to enjoy the puzzles without much hassle.

You can solve one Sudoku puzzle each day by completing the daily challenges.
Solve all monthly puzzles to get different emblems every month.
As you can also attempt Sudoku puzzles challenges and puzzles from the past, you can collect up to 12 different emblems every year.

・There are 6 difficulty levels ranging from Beginner to Challenge.
・There are detailed explanations, complete with illustrations, on all solving methods ranging from Hidden Single to X-Wing.
・All puzzles come with a “Hint” function.
・There is a function that allows you to enter all candidate numbers at once.
・There is a function that allows you to delete all candidate numbers at once.
・There is also a “Hide ads” function (paid), if you do not wish to see any ads.
・You can also check for mistakes with just a simple tap of a button. Incorrect numbers will be displayed in red.
・You can choose whether to highlight duplicate numbers.
・You can choose whether to highlight the block, row and column of the selected cell.
・There is also an “Eraser” function.
・There is a function to undo each step, and another function to start over from the beginning.
・There is also an auto-save function. Even if you quit the puzzle mid-way, you will be able to continue where you left off anytime.
・As there is a time display function, you can attempt to beat your personal record as many times as you wish.

Enjoy Sudoku anytime, anywhere.