Do you know sudoku?

It's a free tool to verify that your own Sudoku question.
You can check it by clicking the [Verify] button and get difficulty.

When launched, an empty number place table will appear.
At first everything is "?".
Enter the number of your own number place here.
The entered numbers are displayed in black.
If there are numbers that can be derived from the entered numbers, they will be displayed in gray.
After completing the input, touch the [Verify] button to obtain the results.
・ When only one solution can be derived
・ When there are multiple solutions
・ When contradiction occurs
The results are shown in the three dialogs of.

At the moment, the ability to load your own number places with your camera and to capture from photos is not yet implemented.

Display the ad at the bottom of the screen.

What’s New

Version 1.2.4

Version 1.2.4 makes the following changes to Version 1.2.3.
-Changed to display "advanced technique level" and "complexity index" in the difficulty level display dialog.
-The "Clear" button in the dialog when a contradiction occurs has been eliminated.

Ratings and Reviews

4.0 out of 5
3 Ratings

3 Ratings

Johnny1649 ,


The only things it needs is image and photo recognition so that I don't have to type in all the individual numbers after I solve a sudoku puzzle on paper.

jckkkdbfvejsjd ,

I’m confused

What does there’s a contradiction mean

App Privacy

The developer, Atsuo Kazama, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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