Last updated on November 30th, 2025 at 05:49 pm
Calcudoku · Math Logic Puzzles – Education Game Review
Calcudoku · Math Logic Puzzles is a Education/Puzzle/Casual game from Matthew Murphy, first launched in 17th January 2017.
It’s rated 4+ and currently has 1,344+ ratings on the App Store.
What Makes Calcudoku · Math Logic Puzzles Stand Out
Enjoy Calcudoku, a fun number puzzle game that tests your math and logic! If you like Killer Sudoku puzzles, you will love Calcudoku!
About Calcudoku number puzzles:
Every Calcudoku has a single solution that can be reached logically. Like Sudoku and Killer Sudoku, fill in the grid such that no two digits repeat in any column or row. Use the shapes in the grid as your guide. Each shape contains a number equaling the product of the shapes' digits. For example a shape with three cells containing the number 6 may have cell values 1, 2 and 3, as 1 × 2 × 3 = 6. Challenge yourself further with larger grids for experts, up to 9×9 size!
Calcudoku offers thousands of fun number puzzles with features to help you solve each puzzle. Enjoy an unlimited number of hints and checks in case you get stuck. Use the calculator tool to help with multiplication and division against large numbers. And rest assured that all puzzle games are automatically saved and restored letting you stop and restart games with ease.
Track your best and average solve times over history with our stats tracker.
Calcudoku, a popular Killer Sudoku variant, was originally invented in 2004 by Japanese math teacher Tetsuya Miyamoto. Also known as KenKen® and Mathdoku, Calcudoku brings to you over 15,000 unique puzzle grids!
You can play Calcudoku by Razzle Puzzles on your phone and tablet. Enjoy Calcudoku online or in offline mode!
For support please contact us at [email protected] or visit RazzlePuzzles.com
This Education game offers engaging gameplay and regular updates for mobile players.
Player Feedback
As a newer release, Calcudoku · Math Logic Puzzles is building its player community. Early feedback suggests .
Recent Updates & Development
Latest Update: 29th September 2025
Recent improvements include:
Performance improvements and patches.
Download & Availability
Calcudoku · Math Logic Puzzles is available through the official App Store for iOS devices.
Get Calcudoku · Math Logic Puzzles on App Store
Requirements: Requires iPhone 5s / iPad Air / iPad Air (Cellular) / iPad Mini 2 (Retina) / iPad Mini 2 (Retina, Cellular) / iPhone 6 / iPhone 6 Plus / iPad Air 2 / iPad Air 2 (Cellular) / iPad Mini 3 or later.
Compatible with iPhone and iPad devices.
Player Experience Highlights
Community Insight:
Love the 9×9 grid. Just wish this particular choice had larger print.
… Is that we cant. Stop. Playing.
We liked the game. We think it be nice to review the completed puzzle before going to the next game.
We like this, but it has two flaws: no undo button (for when we accidentally touch something and change a cell we didnt mean to and then cannot remember what was there) AND it doesnt reorient the screen. If we are using our charge cable, we cannot use this app.
Its a good app for being free. Add banner on the bottom is all Ive had to deal with. But we cannot listen to music from other apps while playing, despite there not being any sounds from this app. Also noticed that this app doesnt appear in our settings…? Not quite sure why, as all our other apps do.
Combines two related disciplines. Early levels relatively easy, but higher levels still seem too hard for us, after a few weeks of practice. We enjoy it.
The app runs solidly with no issues, but it needs some more flexibility to choose difficulty, and honestly its just too simple. We had an Android app that was much more challenging as your skill improved, but sadly the publisher doesnt have an iOS version. This one is good to learn the game for awhile.
Really like the game but no option to purchase. Im fine with the banner at the bottom but when it interrupts for a 30second pop up when Im into playing its annoying.
Seriously, we were hooked when we first started, this is our new go to game! But, when the app is up and running, our iPad doesn't go to sleep…ever. Battery draining when we happen to need to walk away from our iPad for an unknown amount of time. Is there a setting somewhere we can fix.
Great app. Im going to borrow some of these puzzles to show our 6th graders. Itll really help their deductive reasoning.
Tools work well and need no explanation. Fun to play.
Love this game. Such a refreshing and more challenging change from sudoku. Easy to use and offers endless hours of brain exercise.
Never been very good with numbers…but this is great.
Simple, straightforward fun. No advertising shenanigans, no excessive pay to play, just good, cathartic mathematical puzzles with no strings. Love it.
Easy to use. Fun to do. It is almost there. Our suggested enhancements are to allow user to select difficulty. One puzzle could have addition, subtraction, multiplication, and division or any combination of equations. When using Notes allow users to decide if they want the Notes to automatically update or not. Allow users to select more than one box to simultaneously add the same notes.
A great fun app but lately we mostly cannot access the menus in the upper right which kills the app for us. We will keep checking for fixes but without the menu it is pretty useless.
Its not possible to arrange the order of penciled numbers to show how they interact with another cell. Deleted.
For those of you who like kenkenthis is kenken. Gets the neurons firing. Enjoyable. Even tells you where you made errors if you want.
Im glad we found this app. It helps us whine down and works our mathematical memory. It has a very simple design which we love. Im looking forward to a dark mode so its not so bright at night.
Nice except for the annoying adds. Impossible to delete the adds. We would be happy to pay for a version.
The only suggestion we have is to allow us to move the calculator around on the screen so as not to block the squares we are working on. Otherwise an outstanding product.
Love level 5 – not too easy but difficult enough to feel satisfying. Levels 6 and 7 are good when we have time.
Im obsessed with this puzzle. We searched for this type of puzzle after playing similar ones on airline mags. Its great that it offers you a choice of matrix size. It really challenges your brain, especially the 9×9 grid and trying to solve it without using notations or calculators, so you have to keep it in your head. We also enjoy the random mix of math operators, some addition or multiplication only, others mix it up with subtraction and division. You definitely learn the different logical techniques and we feel our aging brain has actually gotten stronger. Our one request would be that if you enter a number accidentally in a square that doesnt conflict with existing numbers, you could remove it without having the loss applied.
We really love this game but is there any way you could sell an ad free version.
Our kids see us playing this game and then they want to do it as well. They dont realize theyre actually learning math.
We really dont like it when we have to watch an ad to get to the next puzzle, but at least the ads are short and the games are free, so its not a total deal breaker. If you like KenKen, this is it, even if it doesnt have the same name.
Really cool, and challenging. You get to do different levels and it doesnt tell you to go to another one. Highly recommended.
Easiest is multiplication hardest is addition.
Fun app. Some puzzles are very hard.
Very fun and challenging, the games are great for logic and lots of help if needed. Its fun.
Fun to play. Beat your own time. Stay sharp, and calm your nerves.
Fun and challenging, gets the brain going.
A very enjoyable game to exercise your brain. Depending on what size square you pick, the games range from easy to fairly difficult to solve.
We love how it doesnt have many ads.Its also a very fun way to challenge your brain.
Beautiful. Fun! Just what you expect.
You should allow the circling of letters that the solver know are correct.
Something changed in ads, we think. Now they are quite long, almost unbearably so. We end up closing the game down instead of watching the ads.
Ive played this for a long time but now the ads are too intrusive. They are part of unity ads. Im finding something else to play.
For the love of god make a version we can pay for with no ads.
Well, first of all, Ill tell you Im 65, Ive always had a knack for math algebra someone and so forth. We can best Sudoku even at the expert level we were getting a little bored even with the 16 x 16 Im very good so we want to tell you that we are so happythat we found something that gives us some challenge, apparently our secret power is only math, so bummer! Thank you very much.
We love the variety and different challenge levels. Sometimes we just want mindless distraction and sometimes we are in the mood for a stiff challenge. Keeping track of your fastest time is also great.
We just started playing this site. Before doing so, we had downloaded several other kenken game apps, and was disappointed by every one of them. One app, once EVERY kenken or Sudoku was finished, the screen switched to joining/paying for other apps – one for changing your voice and appearance to those of celebrities. We found no way to exit from these solicitations, and finally had to resort to doing a hard reset every time so that we could them enter the kenken/sudoku app afresh. Also, the app doesn't allow you to correct a mistaken entry, as you would be able to in a book of sudoku or kenken, instead listing mistakes from 1 to 3, and saying that you lost after three mistakes. After about 10 games, we ditched the app. We have, in a matter of a couple of hours filled in love with this kenken app. You can choose from grids of 3 to 9. The grids are challenging but doable, and the add allows you to change responses without being assigned mistakes. You win when you correctly complete the grid. And, MOST IMPORTANTLY, the app does not send you to app sales sites after the completion of every grid. We have just completed one of the 3, 4, 5, and 6 panel grids, and am looking forward to challenging ourselves with the 7, 8, and 9 grids tomorrow. It is now 1:00 AM, and we must get some sleep before work tomorrow, but we plan to open this app after dinner tomorrow. Although we have yet to play this app a lot, based on our earlier experiences with Sudoku and KenKen apps, we feel this is the best one out there. Pick this KenKen app if you want to enjoy a challenge, while not having to fight the app itself.
Great fun. Sometimes crashes and Ive had to reinstall – losing scores in the process. Main complaint is that it doesnt work like Sudoku with 1-9 digits in each 9 square as well as in rows and columns.
Enjoying this. So far we have completed the 3×3 grid. Moving on to a more challenging one. Senior citizen.
This has become one of our favorite games. The user interface is easy and straight forward. The multiple levels of difficulty make it more interesting. We do have one suggestion. When you have candidates in an open square and a candidate gets erased when a number is put in another square, if that number were to be erased later, could you reinsert the erased candidate.
Works well, but the ads are starting to become increasingly intrusive.
Love the game but the ads are incredibly annoying. Theres not option to pay to get rid of them and currently theres a flashing ad at the bottom of the game. Its a stressful distraction for what should be a relaxing puzzle.
This is very hard. Need better hints. Not just some are wrong and highlighting them and then it unhighlights when you click on a number. Or it adding and number automatically it should give you actual hints.
Good to exercise the brain a bit.
Frustrated: we dont see how to contact the developer so Ill share an issue here. We enjoy the app but the latest update doesnt seem work. We play Calcudoku each morning but today the game doesnt launch. We also tried clicking on the Open button, from the apple App Store, and it still doesnt launch. We see that version 1.31 was launched 1 day ago so Im wondering if that might be part of the problem. We see that v.1.32 the is shown in the version history now. We still cant launch the game on our iPad. Frustrating = watching your stats get better then loose it all. This game is not for us.
User feedback from Apple App Store
App Details
- Version: 1.39
- Size: 33.18 MB
- iOS: 15.0 or later
- Languages: NL, EN, FR, DE, HI, IT, JA, KO, PT, RU, ZH, ES, TR
- Content Advisory:
- Developer: Matthew Murphy
Last updated: 29th September 2025 | Genre: Education, Puzzle | Developer: Matthew Murphy