Sudoku is a popular puzzle game worldwide that is perfect for honing your thinking and concentration skills. Solving Sudoku during your commute, break time, or any idle moment is a great mental exercise. Additionally, you can play it with just your smartphone, without the need for paper and pencil, making it easy to carry around. Enjoy puzzles with our free Sudoku app.

This app offers puzzles with four difficulty levels (Easy, Medium, Hard, and Expert), making it enjoyable for both beginners and advanced players. Even if you are new to Sudoku, you can start with easy levels and gradually increase the difficulty. For seasoned players, there are challenging puzzles that provide a rewarding experience.

Moreover, our app features hint functions and duplicate highlighting. If you get stuck, you can use hints to smoothly progress through the game. These hints can assist both beginners and advanced players, ensuring a frustration-free experience.

Features:
- Duplicate numbers in rows, columns, or blocks are highlighted to avoid using the same number twice.
- If you make a mistake, the undo function allows you to revert your actions.
- You can make notes just like you would on paper.
- When you can't find any more numbers to fill in, you can use the hint feature.
- Over 3,500 puzzles in total!

How to play:
- Each horizontal row contains one number from 1 to 9.
- Each vertical column contains one number from 1 to 9
- Each 3x3 block contains one number from 1 to 9

Start enjoying Sudoku anytime, anywhere with this app and give your brain a workout!