Mathdoku & Killer Sudoku
by InfoHyla
· Puzzle
· Free
On Google Play since October 2013
· Data updated
Mathdoku & Killer Sudoku is made and published by InfoHyla. AppBrain is an independent app data site and isn't affiliated with InfoHyla. The app name, icon, screenshots and description belong to InfoHyla and are shown as published on Google Play.
AppBrain's verdict
Established- Total installs
- 13 thousand
- Rating on Google Play
- 3.64
- 148 ratings
- Last updated
- January 27, 2026
Mathdoku & Killer Sudoku has 13 thousand installs. Users are divided: 3.6 stars from 148 ratings.
Installs
Tracked by AppBrain- Last 30 days
- 5
- Play install range
- 10+ thousand
- Launched
- October 2013
Installs over time
Mathdoku & Killer Sudoku has been installed 13 thousand times. Over the past 30 days, it has been installed 5 times.
Rankings
Google Play top chartsGoogle Play Rankings for Mathdoku & Killer Sudoku
This app is not ranked
Competitors
Similar apps and more from InfoHylaAlternatives to Mathdoku & Killer Sudoku
Releases
Updates seen on Google Play- Version
- 4.36
- Launched
- October 2013
User feedback
Ratings and reviews on Google PlayGoogle Play Rating history and histogram
Comments on Mathdoku & Killer Sudoku for Android
★★★★★
John Goh
· Oct 30, 2021
Best mathdoku/ken ken/Caledon app in the market. There's still room for improvement imo: the difficulty level isn't very accurate. Some 3 stars can be tougher than some 5 stars.
★★★★☆
A Google User
· Dec 16, 2013
Good brain exercise Great way to exercise your brain, but it needs two changes. 1. There should be a"Contact us" button in the help menu. 2. It keeps statistics in the form of a bar graph with games on the x-axis and time used to solve on the y-axis. It keeps a different bar graph for each grid size, but each grid size has different degrees of difficulty, and the degrees of difficulty are all combined in the same bar graph for each grid size. This doesn't make sense.
★★★★★
Maria Jukic
· Mar 2, 2025
Great game! Fun, challenging, and well-designed. Perfect for daily brain exercise.
★☆☆☆☆
David B
· Apr 6, 2025
This used to be an absolutely great app. It was simple, it did the basics, it was fun. Then it changed—it became flashier with no real benefit added (did someone new take it over? Can't tell, but maybe) and it was monetized in a particularly insidious way, where even paying for no ads doesn't actually remove all ads. (ETA: Monetizing is fine, but doing it the way they did? Completely uncool.) I'll be uninstalling, which really is a pity. It used to be so good, and they had to go and ruin it.
★☆☆☆☆
A Hamick
· May 22, 2025
The new update that added coins, which you must buy or watch ads to get, to start new games is garbage. This game was hands down my go-to casual mobile game and this new coin update has me looking for a new app.
★☆☆☆☆
C Levell
· Mar 25, 2025
New release adds nothing but ads longer than it takes to play. Edit:Response is insulting. Played for years, just cycling from 4 to 9 mathdoku at expert, getting a typical ad at the end of the longer puzzles. Now you have to select mathdoku each time, and you get a longer ad even for the short puzzles. I would pay for no ads but too many paid apps don't keep up with Android updates. Zero stars for the response.
★☆☆☆☆
Peter Eby
· Jun 17, 2025
Was great. Could play for free. Now ads and ads. And ads.
★★☆☆☆
Nick S
· Apr 3, 2025
1. I despise forced ads. You either have to watch ads or buy coins, which do not go far. 2. There is a GPL version of the game. It bugs me that this seller has converted a GPL program to pay status. 3. Some of the ads are horribly deceptive. One, in particular, disguises it as an update required notice, and I have seen at least one that did the fake virus warning.
Technology
Found in the app by AppBrain- Ads
- Contains ads
- Price
- Free
- Libraries
- 62
- App size
- 14.8 MB
- Content rating
- Everyone
Technologies used by Mathdoku & Killer Sudoku
15 permissions
·
62 libraries
Subscribe to see full permission and library details
About the app and developer
About Mathdoku & Killer Sudoku
Mathdoku & Killer Sudoku is a puzzle app developed by InfoHyla.
Install Statistics
Mathdoku & Killer Sudoku has been downloaded 13 thousand times. In the last 30 days, the app was downloaded 5 times.
User Ratings
Mathdoku & Killer Sudoku is rated 3.64 out of 5 stars. The rating is based on 150 ratings.
App Information
Mathdoku & Killer Sudoku is freely available from Google Play. The APK size is 14.84 MB. The latest APK version available is 4.36. The last update was on January 27, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on Google Play since October 2013.
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Store listing
By InfoHyla, from Google Play“Mathdoku & Killer Sudoku on the same platform with digits calculator!”
Screenshots by InfoHyla, from the Google Play listing
Description by InfoHyla Written by the developer, not by AppBrain. Click to read.
Mathdoku and Killer Sudoku for Masters!
We made this game for ourselves to play it daily. So we have introduced a lot of tools to skip trivial parts of the both Mathdoku and Killer Sudoku and have fun only with challenging parts.
Avoid boring tapping with these unique features:
- start the game with smartly filled cells with 'maybes' only with possible digits according to the rules for Mathdoku and Killer Sudoku
- long tap cells with 2 or 3 'maybes' to remove trivial 'maybes' in other cells in the same row/column/cage/segment
- lazy mode option in settings to automate trivial solutions (be careful, it's for real Masters)
Help yourself with hard puzzles using these features:
- integrated DigitCalc, a simple calculator that computes all possible combinations of digits in selected cage considering already resolved cells and whether duplicates are allowed.
- set checkpoint by long tapping undo button and rewind to it whenever you want
- option to sum numbers in cages to help in Killer Sudoku solving
- check if solved cells are correct
Rules
As in Sudoku, for both Mathdoku and Killer Sudoku digits may appear only once in each row and column. But unlike Sudoku, these games also have so-called cages..
Each cage in the first cell has a number and an arithmetic operation. The number should be the result of that arithmetic operation using all the digits inside the cage. E.g. '5+' means that all the digits in that cage add up to 5. The order in which the digits are used in the cage is not relevant. Obviously, in Mathdoku only two-cell cages can have a subtraction or division operation.
Mathdoku specifics:
- grid size from 4x4 to 9x9
- all four basic arithmetic operations are used
- digits can be used more than once per cage
Killer Sudoku specifics:
- grid size 9x9 only
- only sum operation in a cage
- no repeating digits inside cage\n
- grid is divided into nine 3x3 quadrants for which the same rules apply
Detailed help and tutorial are available in the game menu. You can also watch YouTube on how to play Mathdoku from Google Play listing or directly from the game.
This game is a descendant of "Mathdoku extended" which had a bunch of loyal players due to the cleanest design and playfulness of all the variants you can find.
You can play one game daily for free and additional just by watching ad. Short intermediate pop-up ads, which will NEVER pop up during the game, could be avoided for a small amount of money, forever!
We consider coin system to be fairer than a subscription, so you only pay (or watch an ad) for the games you play on top of the daily freebies.
If you like our work, have some suggestions or complaints, feel free to contact us at:
infohyla@infohyla.com
Recent changes:
4.36
- small bug fixes
We made this game for ourselves to play it daily. So we have introduced a lot of tools to skip trivial parts of the both Mathdoku and Killer Sudoku and have fun only with challenging parts.
Avoid boring tapping with these unique features:
- start the game with smartly filled cells with 'maybes' only with possible digits according to the rules for Mathdoku and Killer Sudoku
- long tap cells with 2 or 3 'maybes' to remove trivial 'maybes' in other cells in the same row/column/cage/segment
- lazy mode option in settings to automate trivial solutions (be careful, it's for real Masters)
Help yourself with hard puzzles using these features:
- integrated DigitCalc, a simple calculator that computes all possible combinations of digits in selected cage considering already resolved cells and whether duplicates are allowed.
- set checkpoint by long tapping undo button and rewind to it whenever you want
- option to sum numbers in cages to help in Killer Sudoku solving
- check if solved cells are correct
Rules
As in Sudoku, for both Mathdoku and Killer Sudoku digits may appear only once in each row and column. But unlike Sudoku, these games also have so-called cages..
Each cage in the first cell has a number and an arithmetic operation. The number should be the result of that arithmetic operation using all the digits inside the cage. E.g. '5+' means that all the digits in that cage add up to 5. The order in which the digits are used in the cage is not relevant. Obviously, in Mathdoku only two-cell cages can have a subtraction or division operation.
Mathdoku specifics:
- grid size from 4x4 to 9x9
- all four basic arithmetic operations are used
- digits can be used more than once per cage
Killer Sudoku specifics:
- grid size 9x9 only
- only sum operation in a cage
- no repeating digits inside cage\n
- grid is divided into nine 3x3 quadrants for which the same rules apply
Detailed help and tutorial are available in the game menu. You can also watch YouTube on how to play Mathdoku from Google Play listing or directly from the game.
This game is a descendant of "Mathdoku extended" which had a bunch of loyal players due to the cleanest design and playfulness of all the variants you can find.
You can play one game daily for free and additional just by watching ad. Short intermediate pop-up ads, which will NEVER pop up during the game, could be avoided for a small amount of money, forever!
We consider coin system to be fairer than a subscription, so you only pay (or watch an ad) for the games you play on top of the daily freebies.
If you like our work, have some suggestions or complaints, feel free to contact us at:
infohyla@infohyla.com
Recent changes:
4.36
- small bug fixes