Sudoku Premium is a complete Sudoku app that lets you enjoy puzzles without any ads or in-app purchases. It’s just you and the challenge of the Sudoku puzzle. Whether you’re new to Sudoku or a seasoned player, you can choose from four difficulty levels: Easy, Medium, Hard, or Extreme. Each level provides a different level of challenge to keep you engaged.

The app has a user-friendly interface that keeps every tool just a tap away. If you get interrupted while solving, don’t worry—your puzzle is saved exactly where you left it. This means you can come back anytime and continue without losing your progress.

For those who enjoy a variety of challenges, the Custom puzzle mode allows you to enter any Sudoku puzzle you want. You can solve it using the familiar interface that you’d expect from Sudoku Premium. There are also three input modes available: you can use the Digit first input mode, the Cell first input mode, or the pop-up input mode to fill in your numbers.

Sudoku Premium also includes a useful pencil marks feature. This lets you jot down notes with an automatic fill and erase option, making it easier to track possibilities. You’ll see a highlighted selected digit, along with a crosshair for the current row, column, and box you are working on. This helps you stay focused while solving the puzzle.

Another handy feature is the digit counts display, which shows how many of each digit are already placed in the puzzle. If you find yourself stuck, the smart hints logic provides guidance by using deductive reasoning. The app never relies on guesses, ensuring a logical solving experience.

To provide a better solving experience, Sudoku Premium offers two levels of automatic error checking. This way, you can be sure you’re on the right track. If you make a mistake, the unlimited undo options and unlimited redo options make it easy to revert your moves.

The app is designed with flexibility in mind, offering both Night mode and Day mode to suit your preference. With the auto-save feature, you don’t have to worry about losing your progress. Sudoku Premium can even be played offline, so you don't need an internet connection to solve puzzles.

It works seamlessly on both iPhone and iPad, making it accessible for anyone. You can check your performance by tracking your online results. There’s also a top scores leaderboard where you can see how your results compare to others. If you’re feeling competitive, you can take part in the weekly Sudoku competition and join real-time competitions to challenge other Sudoku enthusiasts.

If you have any questions or suggestions, feel free to reach out to the support team. Sudoku Premium offers a fun, engaging experience for everyone who loves solving puzzles. Enjoy your solving experience!