# Killer Sudoku - number game — 80000 logic number puzzles!

> Logic number puzzle game combining Sudoku and Kakuro rules with cage sums. (iPhone/iPad app by 俊杰 龚.)

- Source: https://appshunter.io/ios/app/killer-sudoku-number-game/id1576305047 (this page in markdown: same URL + `.md`)
- Developer: [俊杰 龚](https://appshunter.io/developer/806988706)
- Category: Games, Entertainment, Board, Puzzle
- Price: Free
- Rating: 4.80/5 from 182 App Store ratings · 117 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 32 MB
- Languages: Russian, American English, Dutch, Danish, European Spanish, Italian, Korean, German (Germany), Norwegian Bokmål, Polish and 9 more
- Released: 2021-07-22
- Data updated: 2026-08-27
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/killer-sudoku-number-game/id1576305047/reviews.md

## What is Killer Sudoku?

Killer sudoku (also named sumdoku, addoku, cross-sum or samunamupure) is a logical puzzle game that combines elements of sudoku and kakuro. So its rules are like the classic sudoku very much. Your goal is to fill the grid with numbers like in classic sudoku and also make sure the sum of numbers in cages (areas separated by dotted lines) is equal to the number in the upper left corner of that cage. 

If you are interested in playing number games or math puzzle games, this Killer Sudoku is exactly for you! Killer Sudoku may be a little bit harder than a classic sudoku puzzle game. But we offer 9 balanced difficulty levels for beginners and advanced players. Even you didn't play Killer Sudoku before, you'll become a Killer Sudoku master in no time.

How to play it?
The objective is to fill the grid with numbers from 1 to 9 in a way that the following conditions are met.
1. Each row, column and block contain each number exactly once.
2. The sum of all numbers in a cage must match the small number printed in its corner.
3. No number appears more than once in a cage.

Main Features:
1. Include more than 80,000 puzzles, and all are tested by program.
2. Contain several game modes: Daily Challenge, Game Levels, Trophies Collection.
3. The game offers 9 difficulty levels that are suitable for both beginners and masters.
4. Use free hints when you are stuck.
5. Use auto-check to see the mistakes in real-time.
6. Take part in the ranking, and compete with other players.
7. Long press and lock a number, use for multiple cells, you can enable it in settings.

More Features: 
- Color themes, select your favorite color.
- Unlimited Undo.
- Auto-save game and continue it next time.
- Auto-notes for all the cells.
- Statistics, record all your progress.
- Timer, you can disable it in settings.
- Support phone and tablets.

Thanks for your selecting our Killer Sudoku game, please install it free, train your brain, and enjoy your happy time!

## Key features

- 80,000+ logic puzzles
- 9 difficulty levels
- Daily Challenge mode
- Free hints
- Auto-check for mistakes
- Player rankings
- Color themes

## What do users think of Killer Sudoku?

Overall sentiment: positive

**Pros**

- ✨ Ad-free experience
- 🧠 Great for brain training
- 👍 Functional and easy to use
- 💡 Good mix of levels/difficulties
- 🏆 Daily challenges are great
- 🚀 Smooth performance
- 🧩 Killer Sudoku specific features
- 🆓 Free to play
- 🌐 Offline play supported
- 💯 Highly recommended
- 🌟 Minimal ads
- 🎯 Challenging puzzles
- 🎨 Nice interface
- 📱 Low storage space
- 💡 Hints available
- ✅ Works well
- 👍 Honest and helpful developer
- 🤩 Addictive gameplay
- ✅ Good variety of levels
- 👍 Excellent logic puzzles
- 🚀 Fast and efficient
- 👍 Great for mental sharpness
- 💡 Unique puzzle mechanics
- ✅ Good for time killing
- 👍 Well-designed app
- ✅ Many personalized options

**Cons**

- 📉 Ads have increased recently
- 🐛 Errors in high-level games
- 😵 Ads are inconvenient during play
- 😩 Advertising close button placement
- 🧐 Borders between sums unclear
- 🤔 Difficulty jump between levels
- 😵 Dashed lines are too light
- 🔠 Unplayable Czech translation
- 🎨 Design changes are disliked
- ↔️ Cannot play horizontally
- ⚠️ Incorrect number placement not alerted
- ❌ Restart on three errors is too easy
- 📱 App does not rotate when charging

**Commonly reported bugs**

- Errors in high-level games
- Unplayable Czech translation
- Dashed lines are too light
- App does not rotate when charging
- Forced errors due to invalid Sudokus

**Most requested features**

- Slight color/design adjustments for legibility
- Advertising close button on the edge
- Auto-Complete feature
- Ability to add multiple hints in one cross stroke
- Make dotted lines bolder
- Alert when an incorrect number is placed
- Level between medium and hard
- Ability to play horizontally
- Dark mode option
- Cloud save/Google integration
- Swipe to input numbers

## Recent user reviews (10 of 117)

All indexed reviews: https://appshunter.io/ios/app/killer-sudoku-number-game/id1576305047/reviews.md

### 5/5 — Non-intrusive ads, big range of difficulty levels

*2026-07-22*

Uninstalled other killer sudoku apps because the ads made it a horrible experience.  I hope they keep the ads as they are - a small banner at the bottom and short pop-ups after you finish.  The range of difficulty is also good, though it is a big jump between medium and hard settings.

### 5/5 — Solid

*2026-07-18*

Better than the other options out there.  Less annoying ads and solid gameplay

### 5/5 — Great game

*2026-06-18*

I enjoy playing killer sudoku it is challenging and help me pay attention to all directions of the board at the same time.

### 5/5 — Very good game

*2026-06-13, version 1.3.7*

Easy to use, good game

### 5/5 — Нравится

*2026-04-30*

Очень нравится, что есть реально сложные уровни

### 5/5 — Great functionality, no ads!!!!

*2026-04-08, version 1.3.7*

No ads!! Exactly what I was looking for after the Sudoku.com version wouldn’t let me go more than 2 mins without blaring technicolor ads. This one has all the same functionality (number first selection option, static grid guesses instead of the numbers moving). Only wish is some slight color/design adjustments for better legibility, but it is so beyond preferable to the ad slop or horrible interface from every other version.

### 5/5 — Судоку

*2026-03-02*

Мне нравится эта игра, она реально на поддержание интеллекта в тонусе, а не тупое нажимание на кнопки. И спасибо, что без рекламы. Вечно она сбивала с толку.

### 5/5 — Good game

*2026-02-24, version 1.3.7*

Played this for a few days and all is working well. The levels are a good mix and the daily challenges are great too.

It all just works and the ads are not intrusive being between games. The only improvement I would like is for the advertising close button to be on the edge not in the middle.

### 5/5 — Best Killer Sudoku app

*2026-01-16*

It’s functional, takes up low space, and four of its nine difficulties are cages-only.  Id be hard pressed to find a better killer sudoku app.  It also has hints if you prefer to play that way

### 5/5 — Best one going

*2025-12-01, version 1.3.7*

I’ve tried them all. Either horrid adverts or no auto-fill of notes. Whoever wrote this program is a genius!

## Frequently asked questions about Killer Sudoku

### What is Killer Sudoku?

Killer Sudoku is a logic puzzle game that blends the rules of classic Sudoku with the cage sum mechanic of Kakuro. The objective is to fill a grid with numbers from 1 to 9, ensuring each row, column, and 3x3 block contains each number once. Additionally, the sum of numbers within designated 'cages' must equal the small number printed in the cage's corner, and no number can repeat within a cage.

### What are the main features of this Killer Sudoku app?

This app offers over 80,000 tested puzzles across 9 difficulty levels, suitable for both beginners and advanced players. Key features include Daily Challenges, Game Levels, Trophy Collection, free hints, real-time auto-checking for mistakes, player rankings, and customizable color themes.

### Is this app free to play?

Yes, the app is free to install and play. It is supported by ads, and while the core game is free, there may be options for in-app purchases for additional content or features.

### What devices is this Killer Sudoku app compatible with?

The application is designed to support both phones and tablets, ensuring a good user experience across a range of mobile devices. It also features auto-save functionality, allowing you to continue your game from where you left off.

### Who would enjoy playing this Killer Sudoku game?

This game is ideal for anyone who enjoys number games, logic puzzles, or math puzzles. It's particularly suited for those who find classic Sudoku engaging but are looking for an additional layer of challenge with the cage sum mechanic. The multiple difficulty levels make it accessible to both newcomers and seasoned puzzle enthusiasts.

## Version history (last 5 releases)

### 1.3.9 — 2026-07-18

- Performance and stability improvements

### 1.3.8 — 2026-07-18

- Performance and stability improvements

### 1.3.7 — 2025-03-14

- Performance and stability improvements

### 1.3.6 — 2025-03-01

- Performance and stability improvements

### 1.3.5 — 2024-10-29

- Performance and stability improvements

## Apps similar to Killer Sudoku

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Killer Sudoku by Logic Wiz](https://appshunter.io/ios/app/killer-sudoku-by-logic-wiz/id1641151077) | 4.9 (188) | Free | Games |
| [Sudoku IQ - Train your Brain](https://appshunter.io/ios/app/sudoku-iq-train-your-brain/id1196710560) | 4.6 (39) | Free | Games |
| [Killer Sudoku - Puzzle Games](https://appshunter.io/ios/app/killer-sudoku-puzzle-games/id1549645019) | 4.8 (6,164) | Free | Games |
| [Sudoku: Classic & Variations](https://appshunter.io/ios/app/sudoku-classic-and-variations/id537201666) | 4.8 (1,111) | Free | Games |
| [MultiSudoku: Samurai Sudoku](https://appshunter.io/ios/app/multisudoku-samurai-sudoku/id1136675288) | 4.8 (2,322) | Free | Games |
| [SumSudoku: Killer Sudoku](https://appshunter.io/ios/app/sumsudoku-killer-sudoku/id1259275580) | 4.8 (801) | Free | Games |

## More apps by 俊杰 龚

- [Chinese Chess - China game](https://appshunter.io/ios/app/chinese-chess-china-game/id806988703)
- [Chinese Chess - China chess](https://appshunter.io/ios/app/chinese-chess-china-chess/id862965635)
- [Chess Way - most popular game](https://appshunter.io/ios/app/chess-way-most-popular-game/id994051451)
- [Sudoku - Easy Logic Game](https://appshunter.io/ios/app/sudoku-easy-logic-game/id1419097240)
- [Nonogram - Logic Number Games](https://appshunter.io/ios/app/nonogram-logic-number-games/id1530781272)

All apps by 俊杰 龚: https://appshunter.io/developer/806988706

---

*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.*