Question creation function
You can capture the number place problem of 9x9 squares. To capture the problem, use the camera attached to the smartphone to shoot. Please shoot with as little distortion as possible and without creating shadows.

Redo function
You can step back in steps.

Level judgment function
The difficulty level of the problem is judged independently by 5 levels.

Memo function
You can make a small note of the possible numbers for each square.

animation
We will inform you by sound and animation when it is completed or when you make a mistake accidentally.

Soft keyboard
You can enter smoothly with the unique input method specialized for entering numbers.

Answer peep function
If you tilt the screen, the answer will be displayed.

Character change function
You can change the number of Sudoku question to another letter. You can change the numbers to Hiragana or alphabet to enjoy your own Sudoku.

Other
The captured image is used only in the terminal.