You won’t be looking for a paper puzzle ever again!

With 4 difficulty levels, intuitive interface, and all the functions right at your fingertips, this Sudoku app is sure to be your favorite. Interrupted? Exit Sudoku, and the puzzle is saved exactly as you see it!

Want to know how you stack up against other Sudoku players? Upload your results to our servers and see for yourself, or take part in a weekly Sudoku competition.

* 4 difficulty levels
* 3 input modes: "Digit first", "Cell first", popup
* Pencil marks (a.k.a. Notes) with auto fill / erase option
* Selected digit and various other highlighting options
* Show digit counts option
* Auto-save
* Unlimited Undo and Redo
* Intelligent hints that use only logic
* Two levels of automatic error checking option
* Submit results and track progress online
* Top scores and History
* Real time competitions

Please contact our support team at if you have any questions, comments, or suggestions about improving this Sudoku app.

Like us on Facebook:

Follow us on Twitter:

Or visit us online:


What’s New

Version 11.0.5

- The new "Custom" puzzle function enables you to enter your own puzzle, then solve it using the same familiar interface.
- Ad-free version is no longer a separate program. The upgrade is done in-app now.
- Ad library updates and GDPR consent collection (where applicable).

Ratings and Reviews

4.8 out of 5
5.4K Ratings

5.4K Ratings

JynxBJJ ,

Great app

I’m visually impaired and Red/green colour-blind. This is the first sudoku app I’ve been able to use easily. I read the review that suggested having each number be a different color. Obviously, for those of us with color blindness this wouldn’t be very helpful, I could make the app on usable. Perhaps a setting where The user could choose to use the colorful set up as the default and allow those of us with impaired color vision to keep it at the black and white. I would find it helpful if as the person who suggested the colorful numbers did that the number I have chosen in either the grid it’s self or the number pad at the bottom could be bolded. That way I could easily scan for the numbers that I need. However, the way you have it now works exactly like it does in the paper so it’s not a necessity. I do like how you haveThe scoring set up. Being able to distinguish between my on edited and aided scores lets me really enjoy trying to beat myself. Thanks again for such a great app! PS: please excuse any typos as iPad doesn’t let me see my review in large enough print for me to proofread it.

eric@durhamnc ,

Good interface, good puzzle selection

The interface is simple, but just right. Features: undo, notes. Good: Will tell you if an entry is inconsistent with previous entries, but doesn’t tell you if the entry is wrong. (This is good because it prevents solving by simple guessing instead of logic.) I don’t know yet how much can be undone, so I don’t know whether backtracking is acceptable here. So far, the puzzles all had a a completely direct solution (i.e. no backtracking (aka reductio ad absurdum).) I haven’t seen any popup ads, apart from a single review request, and that only after I’d played several games in three of the four levels. The “easy” games are easy, but not trivial. The “medium” and “hard” games are (in my opinion) really moderately easy and moderate. Game ratings are somewhat subjective so your mileage might vary. I haven’t tried the “extreme” category yet. All in all I am very pleased so far.

C.Ichiban ,

More than one way to solve a board

After my previous favorite Tap Sudoku stopped getting updates, I tried a half dozen apps before finally finding this one, where I could enter the number first then the cell. This speeds up your ability to play and is really a must, but most apps don’t offer it. After one game, I was pleasantly surprised at how the game also keeps your top 10 times. Neat! However, after playing 5-6 times (on “extreme” naturally bc I’m an addict), I came to a point when I realized there were no certain moves left. Thinking I may have missed a hint, and being nervous about the ticking clock, I guessed and it worked. But this continued to happen and I realized these are not true sudoku boards. A TRUE SUDOKU BOARD HAS ONLY ONE WAY TO SOLVE THE PUZZLE. The boards in this app offer several. This is problematic bc you are required to make 50/50 guesses (which often both work) in order to complete the puzzle. There’s no logic as to which 50/50 cells have one or two possibilities. Therefore, there is a new component of luck introduced, and that’s just not sudoku. I love the other features and gameplay functions but I’m not sure I can support this unfortunate flaw in the game itself.

Developer Response ,

Hello. Thank you for writing.

Is it possible that when you come to a point where there are "no certain moves left", it is simply because _you_ don't see the next logical move?

The fact that your guess turned out to be correct does not mean that there are several possible solutions. It just means you guessed correctly.

Regarding your claim that when making a 50/50 guess both often work, this is simply not true. Our puzzles have one and only one solution. If you'd actually taken one guess and followed it to a solution, then the other one would not result in a solution and vise versa.

Again, when you say "there's no logic as to which 50/50 cells have one or two possibilities", is it possible that you simply don't see the logic?

Allow me to reiterate: every puzzle has one and only one solution. There is no guessing
required and the puzzles are solvable with logic alone.

If you come across a puzzle where you are unable to deduce the next logical move, you may find it useful to post it to our forums and someone from the community might be able to help to guide you to the next move ( Or, if all else fails, you may send us a screenshot and we will have a look (


Icenta, Inc.
19.7 MB

Requires iOS 12.0 or later. Compatible with iPhone, iPad, and iPod touch.


English, Dutch, German, Hebrew, Hindi, Hungarian, Japanese, Russian, Simplified Chinese, Swedish

Age Rating
In-App Purchases
  1. Ad-free yearly $1.99
  2. Ad-free quarterly $0.99


  • Family Sharing

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

More By This Developer

You May Also Like