Play Classic Sudoku the most intuitive way: write in the numbers with your finger. Feels just like playing on paper, only better; number highlighting and other features will help you locate patterns without giving away the solution easily.

The game offers unlimited Sudokus in four difficulty levels from easy to expert. Each puzzle can be solved with logical reasoning; no guessing required. If you are new to Sudoku or want to try the next level up, use hints to learn new strategies. The advanced hint system will explain the logic behind each pattern and how to find it on your own. You will see that most of these strategies are not that difficult, even though it may be hard to find them on the board.

Summary of features:

• Number entry by drawing, no number pad
• Use your finger as eraser (left-right-left)
• Double tap to add/clear notes
• Number highlighting, including notes
• Completed numbers gray out (optional)
• Switch between levels anytime, last game saved for each level
• Unlimited puzzles, all solvable, no guessing required
• Advanced hint system designed to teach you new strategies
• Auto notes (for hard and expert level)
• Auto complete button (optional)
• Daily Challenges
• Unlimited undos
• Statistics, top 10 times (tap on timer)
• Game Center leaderboard and achievements
• Font, board design, and backdrop options


What's New

Version 1.28

Keeping up with the latest from Apple. This update also contains bug fixes, UI enhancements and performance improvements.

Ratings and Reviews

4.7 out of 5
646 Ratings
646 Ratings
JBoyd333 ,

Love it! Can you add coloring?

This is a really great app that lets you write the numbers instead of tapping or typing them, and the interface is slick. Since we can already write the numbers would it be possible to add coloring so that we can make our own notes in different colors for Medusa and other strategies? That would be awesome!

Developer Response ,

Thank you for the nice review! Coloring is on the list of features to be added. We would love to get your input on how you would like this to work, so please email us at

Wizza143 ,

Good app but

This is a good, fun, time killing app. However, the motion control for trying to erase a wrong number, keeps thinking that you are writing another number. So what should take you one shot, takes multiple times of erasing the same number until it realizes you want to get rid of it. Maybe there should be an added button or even to be able to circle the number and have it delete? Otherwise, it’s a great app

Developer Response ,

Thank you for the feedback! Please check out the latest update with a much improved erase function.

yoginijj ,

Handwriting analysis needs improvement

This is fun and more like how you’d play with pen and paper but you lose time rewriting a number over and over as it tries to interpret what you’ve written. Even at the very end when there’s only one choice for a number it will waste a bunch of your time saying you’ve written for example a nine instead of a five.

Developer Response ,

Thank you for the feedback. Please update your app to the latest version and you should see an improvement in handwriting detection. You will also see the "Auto complete" button pop in near the end of the game with a few empty cells left. You can turn off this feature in Settings if you don't like it. As always, please email us at; it will help us improve the app further.


Logify LLC
80.8 MB
Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2018 Logify LLC
In-App Purchases
  1. Remove Ads $4.99


  • Game Center

    Challenge friends and check leaderboards and achievements.

  • Family Sharing

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

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