# Sudoku Calm: No Ads, Classic — Logic Puzzles & Brain Training > Classic Sudoku game with multiple difficulty levels and helpful tools. (iPhone/iPad app by 欣 董.) - Source: https://appshunter.io/ios/app/sudoku-calm-no-ads-classic/id6769225722 (this page in markdown: same URL + `.md`) - Developer: [欣 董](https://appshunter.io/developer/1837936567) - Category: Entertainment, Lifestyle - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings · 15 written reviews indexed - Age rating: 4+ - Requires: iOS 16.0 · 12 MB - Languages: Russian, Hindi, Indonesian, Turkish, German (Germany), Italian, Japanese, French (France), Polish, Thai and 10 more - Released: 2026-06-16 - Data updated: 2026-08-27 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/sudoku-calm-no-ads-classic/id6769225722/reviews.md ## What is Sudoku Calm? Sudoku Calm is a clean, classic Sudoku app for players who want a quiet, focused puzzle experience. Start a game in seconds, choose your difficulty, and solve at your own pace with no ads and no noisy distractions. The core experience is fully playable for free. Enjoy classic Sudoku across Easy, Medium, Hard, and Expert, with helpful tools like notes, erase, undo, and number highlighting to make every puzzle feel smooth and intuitive. When you get stuck, smart hints help you move forward without taking away the fun of solving. Instead of only revealing an answer, Sudoku Calm is designed to support learning, pattern recognition, and long-term improvement. Features: - Classic Sudoku gameplay - Easy, Medium, Hard, and Expert levels - Fast start and quick continue - Notes, erase, and undo tools - Smart hints for better solving help - Calm, clean, ad-free experience For players who want deeper guidance, extra smart hint support and step-by-step explanations help you understand why each move works. Whether you want a quick daily brain workout or a longer logic session, Sudoku Calm keeps Sudoku simple, thoughtful, and relaxing. ## Key features - Classic Sudoku gameplay - Four difficulty levels - Quick start and resume - Note, erase, undo tools - Highlighting and checking aids - Intelligent hints - Ad-free experience ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Lifetime Pro | $3.99 | one-time | ## Recent user reviews (10 of 15) All indexed reviews: https://appshunter.io/ios/app/sudoku-calm-no-ads-classic/id6769225722/reviews.md ### 5/5 — 有时候提示没有解题步骤 *2026-08-14* 还是很喜欢这款数独软件的，一些高难度的题目提示没有步骤，直接就显示数字，还有提示不会跳过删除的笔记，明明已经删掉了，提示会重新显示，就很奇怪 **Developer response:** 感谢你的反馈，这个问题正在修复中，下个版本会修复重复提示的问题。 ### 5/5 — 能否支持深色模式 *2026-08-08* 如上 **Developer response:** 我会在后续版本中支持。谢谢你的建议！ ### 5/5 — 很纯净，没广告 *2026-08-07* 建议适配 ipd 的，大屏看的不费眼！ **Developer response:** 我会在后续版本中适配。谢谢你的建议！ ### 5/5 — 无广告，推荐下载试用 *2026-08-06* 启动速度快，对局不会被清后台，可以随时玩。推荐下载 ### 5/5 — 不错的游戏 *2026-08-06* 设计很简单的游戏、没有广告，再加上点关卡就好了。 ### 5/5 — 每天必开app *2026-07-16* 最近一次更新版本 提供了剩余数字功能。大大提高完成时间。每天都会在空暇时间玩上几把。太赞了。无广告。速度快。目前用过最好的数独app。最好再加一个通关时间分享功能。 再加一个普通 中级 高级。专家打了多少关的纪录或者每个级别自己最快通关记录 专家级别难度偏低。是不是可以增加钻石难度。每个级别难度都需要增加 **Developer response:** 感谢你的建议！分享功能已经在新版本中加入了，请更新到最新版本体验。谢谢！ ### 4/5 — 建议 *2026-07-12* 对于已经完成的数字，可以高亮显示，这样就知道哪些数字已经完成了，不用再来回确认。现在选择了一个数字可以高亮已经填上确认正确的数字，但是没有能够同时显示预选数字，希望可以改进。另外预选数字太小，希望可以再大一些。界面皮肤只有一种，希望可以增加一些。 **Developer response:** 感谢你的建议！这个功能已经在新版本中加入了，请更新到最新版本体验。谢谢！ ### 5/5 — 界面整洁，用起来非常舒服 *2026-07-11* 可否能让笔记中的数字在选中时也可以高亮显示，便于观察，谢谢！ **Developer response:** 感谢你的建议！这个功能已经在新版本中加入了，请更新到最新版本体验。谢谢！ ### 5/5 — 笔记 *2026-07-08* 笔记时不符合的数字不能输入报错才可以，其他软件都有，望改进 **Developer response:** 感谢你的反馈！我会在后续版本中加入。谢谢你的建议！ ### 5/5 — 没有广告，很纯净 *2026-07-07* 提一个小建议，已经全部填完的数字自动变灰，一眼就能看出来，下一个空格就直接跳过这个数字 **Developer response:** 感谢你的建议！这个功能已经在新版本中加入了，请更新到最新版本体验。谢谢！ ## Frequently asked questions about Sudoku Calm ### Does 数独时光 have ads? No, 数独时光 offers a clean, ad-free experience, allowing for uninterrupted gameplay and focus on solving puzzles. ### What devices does 数独时光 support? 数独时光 is currently supported on iPhone devices. ### How many difficulty levels are available in 数独时光? 数独时光 features four distinct difficulty levels: Easy, Medium, Hard, and Expert, catering to a range of player skills. ### Can I play 数独时光 offline? Yes, 数独时光 is designed for offline play, allowing you to enjoy classic Sudoku puzzles without an internet connection. ### What tools are available in 数独时光 to help with puzzles? 数独时光 provides practical tools such as note-taking, erasing, undo functionality, number highlighting, and auxiliary checking to assist players. ### Does 数独时光 offer hints? Yes, 数独时光 includes intelligent hints that help you progress without spoiling the puzzle-solving fun, aiding in understanding patterns and improving logic. ### What is the age rating for 数独时光? 数独时光 has an age rating of 4+, making it suitable for a wide range of players interested in puzzle games. ### How often is 数独时光 updated? The latest version of 数独时光 is 1.0.8, and it was last updated on July 15, 2026, indicating active development and maintenance. ## Version history (last 5 releases) ### 1.1.6 — 2026-08-20 - Added more tips and hints. - Fixed known issues for a smoother experience. ### 1.1.5 — 2026-08-17 - Fixed known issues for a smoother experience. ### 1.1.4 — 2026-08-06 - Fixed known issues for a smoother experience. ### 1.1.3 — 2026-08-06 - Fixed known issues for a smoother experience. ### 1.1.2 — 2026-08-05 - Fixed known issues for a smoother experience. ## More apps by 欣 董 - [BabbleNest - Baby First Words](https://appshunter.io/ios/app/babblenest-baby-first-words/id6752524190) - [Video to Live Wallpaper HD](https://appshunter.io/ios/app/video-to-live-wallpaper-hd/id6757311983) All apps by 欣 董: https://appshunter.io/developer/1837936567 ## Related topics [sudoku offline number puzzle](https://appshunter.io/ios/topics/sudoku-offline-number-puzzle) --- *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.*