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MathDoku Extended

MathDoku Extended integrates MathDoku with calculator!
The game is based on the famous Mathdoku from Ben Buxton and his team, an open source implementation of hit KenKen ® game, as printed in the New York Times and The Times (UK). The game is similar to Sudoku but uses a little math.

Our extension has several improvements over the original:


- integrated call to DigitCalc
- a simple calculator that computes all combinations of one-digit numbers which gives a desired result for selected mathematical operation. It is a standalone application which can be used with games such as KenKen ®, MathDoku, Killer Sudoku, Kakuro and similar. If DigitCalc is called from the game, it automatically gives possible combination for selected cage considering already resolved cells and if cage is in line (so without duplicates).


- enable long touch to fill cell. No need to constantly switch between normal and 'maybe' mode. Just tap shortly to put 'maybe' or long touch to put the solution into a cell.


- bigger board
- bigger 'maybe' numbers
- 3x3 digit panel
- new theme with more visible colors

Features removed from the original:
- swipe
- scrolling text on top
- penalty on check progress
- sharing by e-mail

If you are missing some of the removed features and/or don't need the added features please stick to the original. If you like our work and have some suggestions or complaints, feel free to contact us at:

[email protected]

Category : Puzzle

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Reviews (19)

J.. D. B. Dec 17, 2019     

This is a step down from the version I've been using for a few years. There is no copy button, there is no mode switch between pencil and pen, other little flaws. Add these features, and this would be a great app. There was a version of this out there with those features, but it became unstable in the latest Android version.

Joh. G. Oct 30, 2021     

Best mathdoku/kenken/calcdoku app in the market. There's still room for improvement imo: the difficulty level isn't very accurate. Some 3stars can be tougher than some 5stars.

Isn. D. Sep 28, 2019     

This is bloody GOOD, GUYS! WELL DONE👍 I think your CELL INPUT idea of {short push = pencil}, {long push = pen} is GENIUS. It's so intuitive and took about ten seconds to get used to. The calculator is also a great idea. Thanks developer/s

Tho. T. Jul 31, 2020     

I've spent many hours playing this KenKen game. The interface works well with the ability to generate games od different difficulry.levels as well.

Jas. F. Aug 21, 2021     

The king of puzzles. Logic + arithmetic + a practically infinite supply.

Rus. A. May 17, 2019     

Nice update to MathDoku. But i can't find a way to copy and paste cells. Is that possible?

Mah. L. Oct 22, 2018     

Every game is different & challenging

Hen. F. Jan 13, 2017     

You don't understand my issue. I WANT to lose my archive when I uninstall and reinstall Mathdoku Extended. By losing my archive, I would get a new bar graph. The way you have it now, once I have played 250 games at a particular level, the bar graph never changes for that level of difficulty. Please either 1. Let me lose my archive when I uninstall and reinstall the game, 2. Give me a button to erase my archive, or 3. Make the bar graph show the most recent 250 games. I prefer choice 2 or choice 3.

Ali. a. P. S. Aug 21, 2018     

Best implementation of Mathdoku I've played. Like that I can control both size and difficulty separately. +++ Great game.

Dar. K. Dec 20, 2017     

All of the difficult puzzles are so multiplication heavy that they stop being fun quickly.

RG. f. S. Apr 7, 2016     

Playing for about a year. Only complaint is lost archive.

Win. W. Jul 10, 2016     

Fun diversion, it works well and has few ads.

Nic. W. Sep 13, 2017     

The game never seems to know that the level is completed. What am I doing wrong?

Wil. W. Apr 11, 2014     

I only play hardest 9x9. 1. Give option to auto fill entire board at start of game with maybes. (All 9 or digitcalc ... All 9 would be preferred by me) 2. Place maybes in 3x3 grid. 3. Double tap or long press green square for auto fill when only one maybe left. Also: 10x10? 11x11? … NxN? (I would like to try a 25x25 or something insane like that ... Would tax the hell out of my ability to factor numbers in my head, fun!) All in all, my favorite amongst the versions in play store ...

Pet. E. Dec 9, 2013     

Tried all the others. This one let's you pick the size of the board AND a difficulty level for each. 9x9 and 4/5 difficulty is very very hard.

Ala. P. Nov 30, 2013     

At last - an even better adaptation of Ben's original game that was then ruined for so many fervent players. Great improvements and very friendly developer who welcomes comments

Reg. L. S. Sep 30, 2013     

This is the only kenken type app I know of that has the calculator built in. This is a fantastic game. Definitely a must for all fans of this type of game. I cannot praise this app enough! Well designed, well executed. Just perfect in every way. The inclusion of the calculator, which is just fine on its own, makes checking up so much easier. I'd gladly pay for this app.

Tor. I. Feb 28, 2017     

Great puzzle game that refines problem solving and rapid arithmetic skills.

ric. t. Apr 16, 2016     

Best version I have come across, have been playing this for over 2 years