# Sudoku World - Brainstorming!! — Logic puzzles with numbers

> Unlimited Sudoku puzzles with diverse types, multiplayer, and smart features. (iPhone/iPad app by Chaohsien Lee.)

- Source: https://appshunter.io/ios/app/sudoku-world-brainstorming/id463419280 (this page in markdown: same URL + `.md`)
- Developer: [Chaohsien Lee](https://appshunter.io/developer/438073768)
- Category: Games, Entertainment, Puzzle, Word
- Price: Free with in-app purchases
- Rating: 4.70/5 from 1,493 App Store ratings · 368 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.6 · 81 MB
- Languages: Vietnamese, American English, Dutch, Korean, German (Germany), Chinese (Traditional, Taiwan), Chinese (Simplified, China), Japanese
- Released: 2011-10-02
- Data updated: 2026-08-31
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/sudoku-world-brainstorming/id463419280/reviews.md

## What is Sudoku World?

This is an awesome Sudoku app game that allows you to play an unlimited amount of sudoku puzzles on your iOS devices. 

【 Features 】
⊲ There is no possibility to get twice the same puzzle since they are randomly generated.

⊲ Added new kinds of sudoku puzzles:
X Sudoku, Super Sudoku, Jigsaw Sudoku, 16x16 Sudoku and Samurai Sudoku.

⊲ Added multiplayer mode of sudoku game:
You can play/challenge sudoku game with your friends and other sudoku player on line.

⊲ Support !!!!!! GAME CENTER !!!!!!!, 25 Leaderboards and 20 achievements. 

⊲ Five levels of difficulty. 

⊲ Load/Save puzzle from/to the application database. 

⊲ Statistic, it saves every finished puzzles automatically, that allows you to keep tracking your best played records for each level, you can restart it whenever you want to re-challenge it. 

⊲ Pause/Resume which allows you are able to take a short break from the puzzle. 

⊲ Undo/Redo the selected number. 

⊲ Smart note, automatically put the related note on the field, or put all notes for all fields or clear them all with only one tap. 

⊲ Auto/manual check for incorrect numbers. 

⊲ Smart eraser to let you remove number on the field clearly and easily. 

⊲ Hint, to provide you a easy way to find out current single note field, certainly a little penalty is required :-). 

⊲ Keep device from sleeping, your iPhone/iPod no longer sleep while you are thinking in a puzzle. 

⊲ Smart coloring fields, allows you to see the relation of each fields while tapping on it. 

⊲ In game progress indicator, to show you current progress with a bar interface. 

⊲ Compatible with iOS12.0 iPod, iPhone device, Retina Display for iPhone 6/7/8/X/XS (Max) support. 

⊲ Customize your own background by picking up an photo from your own album. 

Any reviews and ratings are all appreciated, your comments are making this sudoku app become better!!

## Key features

- Unlimited randomly generated puzzles
- Multiple Sudoku variants (X, Super, Jigsaw, 16x16, Samurai)
- Multiplayer mode
- Five difficulty levels
- Save/Load puzzles
- Smart note-taking and eraser
- Customizable backgrounds

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Disable Ads | $1.99 | one-time |


## What do users think of Sudoku World?

Overall sentiment: positive

**Pros**

- 👍 Great game
- 🚀 Challenging levels
- 💡 Variety of Sudoku types
- 👍 Helpful features (pencil marks, auto-fill)
- 👍 Good for brain exercise

**Cons**

- 🐛 Freezes/crashes
- 🐛 Unreliable saving/progress tracking
- 🔍 Cluttered/confusing UI
- 🔍 Ads can be intrusive

**Commonly reported bugs**

- Game freezes or crashes frequently
- Progress/scores not saving properly
- UI elements overlapping or hard to use

**Most requested features**

- Add ability to turn off/customize certain features
- Improve save/resume functionality
- Optimize performance on older devices
- Add more customization options (themes, layouts, etc.)

## Recent user reviews (10 of 368)

All indexed reviews: https://appshunter.io/ios/app/sudoku-world-brainstorming/id463419280/reviews.md

### 5/5 — Constant freezing.  Wont respond to touch.

*2025-10-13*

I really hate to leave a negative review. My husband and I enjoy this game very much. We play it on his iPad regularly. It works perfectly on his. But, for some reason on my iPad and my phone this game keeps freezing up. It will let me put in a few numbers and then it won’t respond to touch anymore. It’s very frustrating. I wish there was some fix for this. But there’s no means of communicating with the makers of this game that I know of.

### 5/5 — Great Game

*2025-10-08*

The only problem is they don’t have an auto finish

### 5/5 — Helpful

*2025-08-12*

I love sudoku , when you put a number in the wrong place, the number turns red so you know it , so you can just put a number on whatever place and you just do it until you get it right, I have been using this as an average, it also has a mark which is a pencil and two pluses , if you press it, it shows you the choices of each square so you can just put the numbers it shows and finish another game, it also has different levels to suit you , its really fun so five stars.

### 3/5 — SCORE?

*2025-06-14, version 5.18.2.0*

Maybe, I missed something; but, I never see my score. This is a new app for me.

### 5/5 — Great app

*2025-04-17, version 5.18.2.0*

Zero complaints. Solid and great challenge. Good for your brain health.

### 3/5 — Very good but…

*2025-04-08*

When you make a mistake and put a false number, all the marks you have made are erased, and can’t be recovered, even when stepping backward.

### 5/5 — Sudoku

*2025-03-12*

I’ve been doing these puzzles for years now. And I still enjoy working them out. Got to keep them brain cells working.

### 4/5 — Kamil

*2025-01-05, version 5.18.2.0*

M

### 5/5 — Mrs.El

*2024-09-24, version 5.17.2*

A very good game, interesting and challenging.

### 4/5 — bug 卡顿

*2024-06-22, version 5.17.2*

玩几年了，该修复bug了，现在卡的不能玩了。ios 17.5.1。 何时才能修复？现在根本没法玩…. 不是卡就是被强退😢

## Frequently asked questions about Sudoku World

### What is Sudoku World?

Sudoku World is a mobile application that offers an unlimited supply of randomly generated Sudoku puzzles. It features various Sudoku variants, multiple difficulty levels, and a multiplayer mode for playing with others.

### What are the key features of Sudoku World?

Key features include an unlimited number of unique puzzles, support for multiple Sudoku types like X Sudoku and Samurai Sudoku, a multiplayer mode, five difficulty levels, and smart tools such as auto-notes, an eraser, and hints.

### Is Sudoku World free to play?

The app is free to download and play, but it does offer in-app purchases. These purchases may include features or content that enhance the gameplay experience.

### What devices is Sudoku World compatible with?

The app is compatible with iPod and iPhone devices running iOS 12.0 or later. It also supports Retina Display for iPhone 6/7/8/X/XS (Max).

### How does the multiplayer mode work?

The multiplayer mode allows you to play or challenge friends and other Sudoku players online. This feature adds a competitive and social dimension to the traditional Sudoku experience.

## Version history (last 5 releases)

### 15.26.1 — 2026-02-20

- Adapted latest iOS changes.
- Enhanced display performance.

### 5.18.2.0 — 2024-11-17

- bug fixed

### 5.18.1 — 2024-10-27

- Adapted with latest iOS changes

### 5.17.2 — 2024-01-05

- fix minor bugs

### 5.17.1 — 2023-12-25

- minor bug fixed
- adapte latest iOS changes

## Apps similar to Sudoku World

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Sudoku - Brain Puzzle Games](https://appshunter.io/ios/app/sudoku-brain-puzzle-games/id1442749804) | 4.8 (306,510) | Free | Games |
| [Sudoku Fever - Logic Games](https://appshunter.io/ios/app/sudoku-fever-logic-games/id1247362774) | 4.5 (250) | Free | Games |
| [Sudoku :)](https://appshunter.io/ios/app/sudoku/id398990729) | 4.7 (58,951) | Free | Games |
| [Sudoku Master Edition](https://appshunter.io/ios/app/sudoku-master-edition/id1260190370) | 4.6 (7,892) | Free | Games |
| [Sudoku.com - Number Games](https://appshunter.io/ios/app/sudokucom-number-games/id1193508329) | 4.8 (1,847,599) | Free | Games |
| [Sudoku Puzzle - Brain Games](https://appshunter.io/ios/app/sudoku-puzzle-brain-games/id1492978794) | 4.9 (88,339) | Free | Games |

## More apps by Chaohsien Lee

- [Classic Minesweeper :)](https://appshunter.io/ios/app/classic-minesweeper/id479504556)
- [SUDOKU QQ](https://appshunter.io/ios/app/sudoku-qq/id520464373)
- [⊲Freecell :)](https://appshunter.io/ios/app/freecell/id774878923)
- [⊲Spider :)](https://appshunter.io/ios/app/spider/id775720902)
- [⊲Solitaire :)](https://appshunter.io/ios/app/solitaire/id775721158)

All apps by Chaohsien Lee: https://appshunter.io/developer/438073768

## Related topics

[extreme sudoku](https://appshunter.io/ios/topics/extreme-sudoku)

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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 2026-08-31.*