# ice sudoku — Brain is good

> A comprehensive Sudoku puzzle app with advanced logic and customization. (iPhone/iPad app by 子诚 王.)

- Source: https://appshunter.io/ios/app/ice-sudoku/id1473595660 (this page in markdown: same URL + `.md`)
- Developer: [子诚 王](https://appshunter.io/developer/1473595659)
- Category: Utilities
- Price: $1.99
- Rating: 4.80/5 from 15 App Store ratings · 34 written reviews indexed
- Age rating: 4+
- Requires: iOS 18.0 · 46 MB
- Languages: American English, Japanese, Chinese (Simplified, China)
- Released: 2019-07-24
- Data updated: 2026-08-29
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/ice-sudoku/id1473595660/reviews.md

## What is ice sudoku?

【High performance, rich sudoku bank】
ice sudoku uses an efficient random number algorithm and uses multi-threaded concurrent technology to efficiently utilize Apple A series processors. It can quickly generate 5 types of Sudoku of different difficulty levels (beginner, easy, medium, difficult, and top).
It provides a comprehensive question bank covering SE 1.2~11.9 and supports search and random retrieval.

(1) Beginner, easy, medium, difficult, and top Sudoku special skill questions: 999 questions each
(2) Higher algorithm level Ice Sudoku Sudoku (SE 8.3-SE 9.2): 999 questions
(3) Peak algorithm level Icey Comet Sudoku (SE 8.8-SE 10.5): 999 questions
(4) Super first-class difficulty Sudoku (SE 10.5+): more than 100 questions

【Extreme logic, advanced challenge】
It has a complete logic analysis system that supports step-by-step solutions for any Sudoku, helping you sort out the logical reasoning of each step.
It has a rich library of targeted Sudoku training to help you become a Sudoku master.
Exclusive challenge mode, test level, speed challenge, unlock exclusive icons, so that Sudoku is no longer boring.

[Privacy protection, offline play]
The developer promises not to collect any data from ice sudoku, and you can enjoy all functions without network connection, no ads, no in-app purchases, and fully protect your privacy and security.

[High freedom, customizable]
Supports free circle change to painting, especially suitable for iPad with Pencil.
Supports Sudoku customization, where the numbers are determined by you, and there are templates to generate axial symmetric Sudoku.
The archive system is complete, and you can export 81 Sudoku strings to facilitate the management of your Sudoku library and free sharing.

[Rich functions, simple and intuitive]
The interface design is simple and clear, and continues to improve. iOS 13 and above devices support Sudoku scanning recognition.
Automatically fill in candidate numbers, error protection, highlight candidate numbers, candidate number background color adjustment, quick fill, and more convenient functions are waiting for you to explore.

[Continuous updates, support feedback]
Whether you are a master who can solve all kinds of Sudoku easily, or a Sudoku beginner, you can find the right questions for you here.
If you have better suggestions, please contact us so that we can hear your voice!

Official website of ice sudoku: https://github.com/tropicalwzc/ice_sudoku.github.io

## Key features

- Extensive Sudoku question bank
- Multiple difficulty levels
- Step-by-step logic analysis
- Offline play
- Customizable gameplay
- Sudoku scanning recognition

## Recent user reviews (10 of 34)

All indexed reviews: https://appshunter.io/ios/app/ice-sudoku/id1473595660/reviews.md

### 5/5 — Filled candidates

*2026-08-16*

Filled candidates always revert to previous state. When you erase a possible candidate, it pops up back again!

Reviewed again on 16/08/2026:
The new version has fixed everything and Ice Sudoku is back to being the best Sudoku on the AppStore

**Developer response:** Using 6.0.1 version will fix the problem

### 5/5 — 报告一个bug

*2026-08-14*

候选数字去掉之后再做其他操作，有概率让去掉的候选数字再次出现。另外字号有点小，老花眼的人看起来有点费劲，可以增加一个设置字号的功能吗？

**Developer response:** 可以考虑，先更新到6.0.1试试，布局字体放大了一些

### 3/5 — Buggy

*2025-05-25*

Disappointed. Buggy. Too much to detail here.

### 5/5 — 最好的数独app

*2025-03-30*

没有之一。

### 5/5 — 纯粹的数独

*2025-03-28*

21年玩到现在，没有花里胡哨的东西

### 5/5 — 主题配色能不能同系统配色区分开

*2024-12-14*

系统开的深色模式，应用也自动默认深色模式，能不能做个设置自定义，可以选择跟随系统或者自定义，谢谢开发者！

### 5/5 — Best sudoku app ever

*2024-04-07*

非常pro，目前用过的最好的数独app。就是好像背景颜色只能跟随系统亮暗不能单独调整，宫间分割也不太显眼，希望增加更多配色可供自由选择。

**Developer response:** 新增了九宫之间的分割线，可以在设置里打开，可以更新试一下，可能会好一点～

### 5/5 — 能不能把夜间模式作为可选项，可以自动关闭暗色模式

*2024-02-22*

不适应夜间模式，希望能手动关掉

**Developer response:** 这是iOS 13苹果强制的开发规范，所有app都需要适配的。你可以在系统设置->显示与亮度 里面关闭自动跟随日落时间开启深色模式，然后勾选上方的浅色模式，这样就可以手动永久使用浅色模式。

### 5/5 — 需要一个使用说明！

*2023-12-22*

每个按钮啥意思需要一个详细说明，还有就是学习技巧里面，想有教学。

### 5/5 — 图片导入识别率不稳定

*2023-10-15*

好软件，看到麻烦优化下
图片导入识别，同一截图有好几个识别结果，准确率太低了

## Frequently asked questions about ice sudoku

### What makes ice sudoku's Sudoku bank stand out?

ice sudoku boasts a rich question bank with over 1000 questions for each of its five difficulty levels, including specialized 'Ice Sudoku' and 'Icey Comet Sudoku' variants. It also offers over 100 'Super first-class difficulty' puzzles for advanced players.

### Does ice sudoku offer help for difficult puzzles?

Yes, ice sudoku features a complete logic analysis system that provides step-by-step solutions for any puzzle. This system helps users understand the reasoning behind each move, aiding in their progression.

### Can I play ice sudoku without an internet connection?

Absolutely. ice sudoku is designed for offline play, ensuring you can enjoy all its functions without a network connection. The developer also guarantees no data collection, prioritizing your privacy and security.

### How can I customize my experience in ice sudoku?

ice sudoku offers high freedom in customization. You can change circle colors for drawing, especially useful with an iPad Pencil. The app also allows you to customize Sudoku puzzles, set your own numbers, and use templates for axial symmetry.

### What are the pricing details for ice sudoku?

ice sudoku is available for a one-time purchase of $1.99. There are no in-app purchases or advertisements, offering a complete and uninterrupted experience.

### Does ice sudoku have ads?

No, ice sudoku is completely ad-free. The developer explicitly states that the app contains no advertisements, allowing for a seamless and focused gameplay experience.

### On which devices can I use ice sudoku?

ice sudoku is supported on iPhone, iPad, and iPod. It requires iOS 13 or above and is optimized for efficient performance on Apple's A series processors.

### How frequently is ice sudoku updated?

The latest version, 5.1.0, was last updated on December 1, 2025, indicating a commitment to ongoing development and support. Users are encouraged to provide feedback for future improvements.

## Version history (last 5 releases)

### 6.0.3 — 2026-08-26

• Improved board rendering performance by avoiding unnecessary cell updates, making selection, digit entry, and candidate editing feel smoother.
• Fixed faint handwriting in the modern UI so PencilKit tool opacity is now respected.
• Improved the iPad landscape workspace and device detection for more consistent layouts across iPad sizes.
• Fixed iPad Bluetooth keyboard behavior after pressing E to show the next hint: arrow-key navigation and the selection frame now recover correctly. Readable Mode also enlarges keypad digits correctly on wide iPad layouts.
• Improved multilingual VoiceOver and accessibility announcements, and fixed several UI refresh issues.

### 6.0.2 — 2026-08-20

1. Fixed crashes
2. Optimized error protection mode
3. Added easy-read mode
4. Supports Bluetooth keyboards

### 6.0.1 — 2026-08-13

Themes now color the whole board — selection frame, candidates, coordinates, and keypad all follow your chosen theme and custom color sets.
Also fixed: medium-difficulty generation occasionally hanging, UI stutter from hint bubbles, and a restored completion check that confirms right or wrong answers. Manually removed candidates stay removed, and top-tier difficulty analysis is much faster.

### 6.0.0 — 2026-08-10

- Rebuilt with Swift 6 and SwiftUI, with one adaptive experience across iPhone and iPad.
  - Improved iPad landscape layout with clearer board, analysis, and control areas.
  - Support custom number colors.
  - Enhanced hints with candidate highlighting, inference routes, and detailed technique explanations.
  - Improved the puzzle library with pack browsing, search, random selection, and completion tracking.
  - Import puzzles from the clipboard, camera, or Photos, then review and correct the recognized grid before applying it.
  - Added a more complete save experience with named saves, quick saves, restore, sharing, and deletion.
  - Existing autosaves and named saves from earlier versions remain readable during migration.
  - Improved responsiveness with cancellable background generation, analysis, and image-recognition tasks.
  - Improved Dark Mode, Dynamic Type, VoiceOver, and English, Simplified Chinese, and Japanese localization.
  - Removed the unused Bluetooth settings entry.

### 5.1.1 — 2026-05-12

Fixed multiple crashes

## Apps similar to ice sudoku

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Sci-Lab](https://appshunter.io/ios/app/sci-lab/id1197726221) | — | Free | Utilities |
| [Calctan](https://appshunter.io/ios/app/calctan/id1445480535) | 4.5 (61) | Free | Utilities |
| [驾考必过秘籍-2025驾校学车考驾照](https://appshunter.io/ios/app/2025/id1590261742) | — | Free | Utilities |
| [Poker AI - Game & Strategy](https://appshunter.io/ios/app/poker-ai-game-and-strategy/id1553727514) | 4.7 (697) | Free | Utilities |
| [Brain Power Race](https://appshunter.io/ios/app/brain-power-race/id1417162091) | 5.0 (1) | Free | Utilities |
| [Random Of King](https://appshunter.io/ios/app/random-of-king/id6736810110) | — | Free | Utilities |

## More apps by 子诚 王

- [ice five chess](https://appshunter.io/ios/app/ice-five-chess/id1474468171)
- [ice lost maze](https://appshunter.io/ios/app/ice-lost-maze/id1481982934)
- [ice box](https://appshunter.io/ios/app/ice-box/id1482591004)
- [ice reversi](https://appshunter.io/ios/app/ice-reversi/id1509012945)
- [ice sky](https://appshunter.io/ios/app/ice-sky/id1518396525)

All apps by 子诚 王: https://appshunter.io/developer/1473595659

---

*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 2026-08-29.*