Andoku Calcudoku

Contains adsIn-app purchases
297 reviews
Content rating
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About this game

How to play

The Calcudoku game grid has to be filled in such a way that the specified conditions are met by simple calculations in the four basic arithmetic operations.

As with Sudoku, no number may appear more than once in any row or any column. In addition, there are so-called cages, each of which contains a mathematical operator and a target value. This value corresponds to the result to be achieved by the calculation with the values in the cage.

Every puzzle has a unique solution that can be found without guessing.


• five different grid sizes (from 5x5 to 9x9)
• six levels of difficulty per grid size
• 15,500 unique puzzles in total
• games are automatically saved
• unlimited undo/redo
• a built-in calculator


Calcudoku was developed by the Japanese teacher Tetsuya Miyamoto for his students to promote the ability of mathematical and logical thinking. The game is also known as MathDoku, Ken-Doku™ and KenKen™.
Updated on
Apr 26, 2022

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Location, App activity and 2 others
Data is encrypted in transit
Data can’t be deleted
297 reviews
Andrew Turner
August 23, 2022
I'm a fan of the Andoku Sudoku app and I had high expectations of this app as it is from the same author, I wasn't disappointed! Much like the Sudoku app, there's built-in help/hints if you want them, to help teach you how to solve the puzzles. Unlike a lot of app games, there's no random 'chance element' in playing this, it is purely down to your skill to solve the puzzles. Recommended for people who prefer to exercise their brain rather than doing something mindless in their downtime!
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A Google user
April 5, 2020
Nice design, but serious defects.. here are only some: 1- you can not easily leave the game 2- it deletes my own pencil marks 3- it forces four arithmetic operations on me in each and every game..!! 4- zero is included as a candidate digit in 50% of the games. You can skip such games, but they are offered back to you each time you start a new game
12 people found this review helpful
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Jacob Rumpf
December 7, 2020
This app uses division groups of more than two squares. I don't think that's valid in kenken. Also, there are no settings to disable automatic pencil erasing (when you pencil in a space with a number, ink in another space, and the penciled number is removed automatically), so you can't use alternate solving techniques or do it yourself.
5 people found this review helpful
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Markus Wiederkehr
January 13, 2021
This app does not aim to be an exact KenKen clone. In this app division for more than 2 cells is defined as the largest number divided by all other numbers in the cage. So 3/ could be 6/2/1, for example.

What's new

Press the lightbulb icon at any time during gameplay for a smart hint on how to proceed!

Other changes:
• Minor design changes
• Updated library dependencies