# Calcudoku · Sudoku-like Puzzle — Math Logic Puzzles

> Logic and math number puzzle game similar to Sudoku and Killer Sudoku. (iPhone/iPad app by Matthew Murphy.)

- Source: https://appshunter.io/ios/app/calcudoku-sudoku-like-puzzle/id1195710578 (this page in markdown: same URL + `.md`)
- Developer: [Matthew Murphy](https://appshunter.io/developer/931157056)
- Category: Games, Education, Casual, Puzzle
- Price: Free
- Rating: 4.70/5 from 1,524 App Store ratings · 197 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 40 MB
- Languages: Russian, Hindi, American English, Dutch, European Spanish, Italian, Korean, German (Germany), European Portuguese, Turkish and 3 more
- Released: 2017-01-17
- Data updated: 2026-08-27
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/calcudoku-sudoku-like-puzzle/id1195710578/reviews.md

## What is Calcudoku · Sudoku?

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 9x9 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 support@razzlepuzzles.com or visit RazzlePuzzles.com

## Key features

- Sudoku-like number puzzles
- Logic and math challenges
- Shape product calculations
- Unlimited hints and checks
- Calculator tool
- Automatic game saving
- Solve time statistics

## What do users think of Calcudoku · Sudoku?

Overall sentiment: positive

**Pros**

- 🤓 Challenging and engaging puzzles
- 📈 Tracks progress and stats
- 🧠 Exercises the brain
- 🎨 Simple and clean design
- 🕰️ Variety of puzzle sizes and difficulties

**Cons**

- 🔊 Loud and intrusive ads
- 🤯 Confusing pencil mode/number entry controls
- 🤖 Automatic note erasure issues
- 🔍 Small text and UI elements on larger puzzles
- 🤔 Lack of customization options (difficulty, operations)

**Commonly reported bugs**

- App crashes when using hint button
- Incorrect math calculations in some puzzles
- Blank screen issues after completing puzzles
- Inconsistent recording of best times

**Most requested features**

- Add undo/redo functionality
- Provide option to disable ads or pay for ad-free version
- Allow customization of puzzle difficulty and operation types
- Improve visibility and clarity of pencil mode indicator
- Optimize UI for larger screens and older devices

## Recent user reviews (10 of 197)

All indexed reviews: https://appshunter.io/ios/app/calcudoku-sudoku-like-puzzle/id1195710578/reviews.md

### 4/5 — Programming error

*2026-08-10, version 1.40*

This is a good game, but sometimes the 4x4 puzzles have more than one solution.

### 5/5 — for people that struggle with math 🩷

*2026-07-19, version 1.40*

I struggle with math  and my aunt is a math teacher and she was playing this game showing one of her students the game. I ask what game are y’all playing she  said Calcudoku I said oh . So I downloaded  it , it is fun  and helpful and I got better grades in my class after playing this game  please download game if u struggle with math !!!!!!!! 🩷🩷🩷🩷🩷👌👌

### 3/5 — No option to pay to remove ads

*2026-07-10, version 1.40*

Great game, let me pay to remove ads

### 1/5 — Bogus virus alerts

*2026-06-06, version 1.40*

App shows bogus virus alerts to sell bogus antivirus apps.

### 5/5 — Fun puzzle

*2026-04-28, version 1.40*

Calcudoku is challenging and fun

### 5/5 — How can I remove ads?

*2026-04-01, version 1.40*

I found this recently and love it, except that after I do a few puzzles on my iPad, full-screen game ads come up with no way to get rid of them or to return to the puzzle! The interface is good and I love the choice of grid sizes. I would gladly pay to buy it.

### 1/5 — Menu on top right does not roll down

*2026-03-10, version 1.39*

Strange but seems not to work as well as in the past.

### 3/5 — Full screen alert

*2026-02-19, version 1.39*

This app allowed a “browser-based scam page” today. I like this game, but had not played in some time. Yesterday the play was interrupted by a full screen alert, covering everything. Swipe up finally allowed me to exit the  full screen.

### 4/5 — Answer check

*2026-02-08, version 1.39*

Why can we no longer tap the top right icon to see if our answers are correct?

### 4/5 — Great game but long ads

*2026-01-03, version 1.39*

This is a great game but no option to pay/purchase to get rid of ads. Some of the ads seem to go for like 5 minutes

## Frequently asked questions about Calcudoku · Sudoku

### What is Calcudoku?

Calcudoku is a fun number puzzle game that combines math and logic. It's a Sudoku-like puzzle where you fill a grid with digits, ensuring no repeats in rows or columns, while also using the product of digits within defined shapes to solve the puzzle.

### How do I play Calcudoku?

You fill in the grid cells with numbers. The rules are similar to Sudoku: no digit can repeat in any row or column. Additionally, each outlined cage (shape) has a target number that is the product of the digits within that cage. The numbers within a cage can repeat.

### Is Calcudoku free to play?

The application is free to play. However, it does contain advertisements. There are no in-app purchases mentioned for removing ads or unlocking content.

### What devices can I play Calcudoku on?

You can play Calcudoku on your phone and tablet. The game supports both online and offline modes, allowing you to enjoy the puzzles wherever you are.

### What features help me solve the puzzles?

Calcudoku offers unlimited hints and checks to assist you if you get stuck. It also includes a calculator tool to help with multiplication and division, especially for larger numbers, and automatically saves your progress.

## Version history (last 5 releases)

### 1.40 — 2026-03-16

Performance improvements and patches.

### 1.39 — 2025-09-29

Performance improvements and patches.

### 1.38 — 2025-02-14

Performance improvements and patches.

### 1.37 — 2025-02-11

Performance improvements and patches.

### 1.36 — 2024-08-16

Performance improvements and patches.

## Apps similar to Calcudoku · Sudoku

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Math Puzzle Games - Crossmath®](https://appshunter.io/ios/app/math-puzzle-games-crossmath/id1671991909) | 4.9 (254,486) | Free | Games |
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| [Math Crossword — Number Puzzle](https://appshunter.io/ios/app/math-crossword-number-puzzle/id6469306922) | 4.8 (122,344) | Free | Games |
| [Sudoku - Brain Puzzle Games](https://appshunter.io/ios/app/sudoku-brain-puzzle-games/id1442749804) | 4.8 (305,807) | Free | Games |
| [Nonogram - IQ Logic Pic Puzzle](https://appshunter.io/ios/app/nonogram-iq-logic-pic-puzzle/id867654947) | 4.4 (9,199) | Free | Games |
| [Multiplication Math Flashcards](https://appshunter.io/ios/app/multiplication-math-flashcards/id960948021) | 4.4 (1,111) | Free | Games |

## More apps by Matthew Murphy

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- [2048 Classic · Swipe Game](https://appshunter.io/ios/app/2048-classic-swipe-game/id940973491)
- [Word Search Puzzles ··](https://appshunter.io/ios/app/word-search-puzzles/id949222159)
- [SwipeOut · Swipe Game](https://appshunter.io/ios/app/swipeout-swipe-game/id962072541)
- [Color Crush · Matching Game](https://appshunter.io/ios/app/color-crush-matching-game/id980132406)

All apps by Matthew Murphy: https://appshunter.io/developer/931157056

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*