Do you find yourself solving beginner puzzles easily,
but get stuck at the same points when the challenges get tougher?

Learndoku is the perfect app for anyone who wants to learn Sudoku.

Start from the basics and learn various Sudoku techniques through our clear tutorials.
Improve your understanding by using the Study Mode, designed to help you grasp advanced solving methods.

In Study Mode, you’ll receive unlimited hints that guide you step-by-step through solving techniques,
presented in order of difficulty. Following these hints naturally builds your skills and confidence.

If Sudoku still feels challenging, start your learning journey with Study Mode today.

From learning to practicing to real gameplay,
progress through carefully designed puzzles of increasing difficulty.

With Learndoku, you’ll soon be able to solve complex, advanced Sudoku puzzles on your own.

Take a step closer to mastering the world of Sudoku with Learndoku.

■ Puzzle Modes
1. Study Mode
: Designed for learning Sudoku techniques
- Auto-notes feature available
- Provides unlimited hints on Sudoku solving methods

2. Challenge Mode
: Practical mode for applying Sudoku techniques
- Auto-notes feature not available
- Provides hints for correct answers

■ Key Features
- Four difficulty levels (Easy, Normal, Hard, Extreme)
- Hint providing function
- Automatic note-taking feature
- Manual note input option
- Highlights the row, column, and block of the selected cell
- Highlights all identical numbers in the grid when a number is selected
- Error indication for incorrect inputs
- Continuous input after number fixing
- Updates related notes when numbers are entered
- Displays the count of remaining numbers by digit

■ Sudoku Rules
- The grid consists of a 9x9 square with a total of 81 cells
- Fill in numbers 1 to 9 following these rules without duplicates:
1) Each number appears only once in each row
2) Each number appears only once in each column
3) Each number appears only once in each 3x3 sub-grid