# Sudoku ′ — Sudoku free of distraction

> Unlimited Sudoku puzzles with multiple difficulty levels and a clean interface. (iPhone/iPad app by Mind The Frog, Inc..)

- Source: https://appshunter.io/ios/app/sudoku/id408188960 (this page in markdown: same URL + `.md`)
- Developer: [Mind The Frog, Inc.](https://appshunter.io/developer/329981779)
- Category: Games, Entertainment, Board, Puzzle
- Price: Free with in-app purchases
- Rating: 4.70/5 from 38,355 App Store ratings · 495 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.4 · 6 MB
- Languages: American English, French (France), Japanese, Chinese (Simplified, China), European Spanish
- Released: 2010-12-16
- Data updated: 2026-09-01
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/sudoku/id408188960/reviews.md

## What is Sudoku ′?

Sudoku for beginners and advanced players alike, with unlimited grids on or offline, 6 difficulty levels ranging from "easy" to "diabolical," daily challenges, and a beautiful ergonomic design.

Sudoku with no distractions:
- Fast: no lengthy intros or slow animations.
- Small: doesn't eat up a lot of storage on your device.
- Friendly: big buttons avoid fat-fingering.
- Non-intrusive: plays your music and nothing else.

Sudoku with all the nuts and bolts:
- Undo / Redo.
- 10 concurrent grids.
- Automatic and manual notes.
- Conflict and error highlighting.
- Customizable input and display settings.

Sudoku on all your devices:
- Universal: iPad, iPhone, and iPod touch.
- Retina: native resolution on all screens.

For feature requests and feedback, please email us at help@mindthefrog.com.

Enjoy,
The friendly team at mindthefrog :)

## Key features

- Unlimited Sudoku grids
- Offline play
- 6 difficulty levels
- Daily challenges
- Undo/Redo functionality
- Automatic and manual notes
- Conflict and error highlighting

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

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


## What do users think of Sudoku ′?

Overall sentiment: positive

**Pros**

- 👍 Easy to use
- 🧠 Challenging levels
- 🎨 Customizable colors
- 📝 Helpful note-taking feature
- 🔍 Number highlighting

**Cons**

- 🔍 Confusing note-taking behavior
- 🔍 Difficulty level jumps
- 🔍 Ads interrupting gameplay
- 🔍 Lack of progress tracking
- 🔍 Unstable on some devices

**Commonly reported bugs**

- Puzzle errors
- App crashes
- Incorrect number placement
- Sideways orientation on tablets

**Most requested features**

- Ability to stay in note mode
- More granular difficulty levels
- Mute option for ads
- Progress tracking and statistics
- Improved stability on older devices

## Recent user reviews (10 of 495)

All indexed reviews: https://appshunter.io/ios/app/sudoku/id408188960/reviews.md

### 1/5 — Good app but REALLY wants to know how you feel about it

*2026-08-22, version 3.9.8*

Perfectly functional sudoku app except that every once in a while it gets on this kick of asking you rate the app after EVERY SINGLE game. It’s probably not a good idea to annoy somebody and then ask them to give you a review. But other than that…

### 5/5 — Good

*2026-08-18, version 3.9.8*

Good

### 5/5 — Best interface

*2026-08-12, version 3.9.8*

This app has the best interface out of any available. It’s the easiest to use, and has clear visuals. Also there are more difficulty levels than most, and the hard ones are hard

### 5/5 — Great game

*2026-08-07, version 3.9.8*

Been playing for three years every night always a challenge lots of fun

### 5/5 — Sudoku

*2026-08-04, version 3.9.8*

Great

### 5/5 — Love this app

*2026-07-25, version 3.9.8*

I absolutely love this app, I use this every moving as part of good I wake up my sleepy brain. It helps cognitive function and keeps me sharp. The app never malfunctions and is reliable 100%

### 5/5 — Great game. Love it.

*2026-07-22, version 3.9.8*

Easy to play. Nice features. The best app.

### 5/5 — great game!!

*2026-07-14, version 3.9.8*

an amazing experience! had a blast

### 5/5 — great game

*2026-07-11, version 3.9.8*

My favorite iteration of sudoku online. such low storage taking up asw

### 5/5 — Great game

*2026-07-04, version 3.9.8*

Nice big buttons, so no fat fingers.

## Frequently asked questions about Sudoku ′

### What is this app?

This app provides an unlimited supply of Sudoku puzzles playable online or offline. It caters to all skill levels with six difficulty settings, daily challenges, and a clean, ergonomic design. Key features include undo/redo, note-taking, and error highlighting for a smooth gameplay experience.

### What are the key features of this Sudoku app?

The app offers unlimited Sudoku grids, playable offline, across six difficulty levels from easy to diabolical. It includes daily challenges, a distraction-free interface with big buttons, undo/redo, 10 concurrent grids, automatic and manual notes, and conflict/error highlighting.

### Is this app free to download and play?

Yes, the app is free to download and play. It is supported by ads and offers in-app purchases, which may provide additional features or remove advertisements. Specific pricing for in-app purchases is not detailed in the description.

### What devices is this app compatible with?

This app is designed to be universal, meaning it is compatible with iPad, iPhone, and iPod touch devices. It also supports native resolution on all screens, including Retina displays, ensuring a crisp visual experience across Apple devices.

### Who is this app for and what are common use cases?

This app is for anyone who enjoys playing Sudoku, from beginners learning the ropes to advanced players seeking a challenge. Common use cases include passing time during commutes, exercising the brain, or engaging in a relaxing yet mentally stimulating activity at home.

## Version history (last 5 releases)

### 3.9.8 — 2025-06-20

Performance improvements and bug fixes.

Please continue to send us your feedback, bug reports, and feature requests to help@mindthefrog.com.

Enjoy,
The friendly team at mindthefrog :)

### 3.9.7 — 2024-11-28

Performance improvements and bug fixes.

Please continue to send us your feedback, bug reports, and feature requests to help@mindthefrog.com.

Enjoy,
The friendly team at mindthefrog :)

### 3.9.6 — 2024-06-14

Performance improvements and bug fixes.

Please continue to send us your feedback, bug reports, and feature requests to help@mindthefrog.com.

Enjoy,
The friendly team at mindthefrog :)

### 3.9.5 — 2024-05-07

Performance improvements and bug fixes.

Please continue to send us your feedback, bug reports, and feature requests to help@mindthefrog.com.

Enjoy,
The friendly team at mindthefrog :)

### 3.9.4 — 2024-04-06

Performance improvements and bug fixes.

Please continue to send us your feedback, bug reports, and feature requests to help@mindthefrog.com.

Enjoy,
The friendly team at mindthefrog :)

## Apps similar to Sudoku ′

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Sudoku ′ No ads](https://appshunter.io/ios/app/sudoku-no-ads/id329981776) | 4.8 (28,552) | $1.99 | Games |
| [Killer Sudoku - Brain Games](https://appshunter.io/ios/app/killer-sudoku-brain-games/id1532397340) | 4.7 (26,573) | Free | Games |
| [Sudoku.com - Number Games](https://appshunter.io/ios/app/sudokucom-number-games/id1193508329) | 4.8 (1,847,599) | Free | Games |
| [Sudoku - Brain Puzzle Games](https://appshunter.io/ios/app/sudoku-brain-puzzle-games/id1442749804) | 4.8 (306,510) | Free | Games |
| [Sudoku Puzzle - Brain Games](https://appshunter.io/ios/app/sudoku-puzzle-brain-games/id1492978794) | 4.9 (88,339) | Free | Games |
| [Sudoku Color - Classic Puzzle!](https://appshunter.io/ios/app/sudoku-color-classic-puzzle/id1503221765) | 4.8 (34,525) | Free | Games |

## More apps by Mind The Frog, Inc.

- [Sudoku ′ No ads](https://appshunter.io/ios/app/sudoku-no-ads/id329981776)

All apps by Mind The Frog, Inc.: https://appshunter.io/developer/329981779

## Related topics

[sudoku mix quadoku](https://appshunter.io/ios/topics/sudoku-mix-quadoku) · [fantastic sudoku variants](https://appshunter.io/ios/topics/fantastic-sudoku-variants) · [versatile sudoku](https://appshunter.io/ios/topics/versatile-sudoku) · [qsolvesudoku](https://appshunter.io/ios/topics/qsolvesudoku) · [sudoku helper](https://appshunter.io/ios/topics/sudoku-helper) · [dilara dandin](https://appshunter.io/ios/topics/dilara-dandin) · [sadok](https://appshunter.io/ios/topics/sadok) · [difficult sudoku](https://appshunter.io/ios/topics/difficult-sudoku) · [easy sudoku kids](https://appshunter.io/ios/topics/easy-sudoku-kids) · [sudoku solver with photo](https://appshunter.io/ios/topics/sudoku-solver-with-photo) · [enjoy sudoku](https://appshunter.io/ios/topics/enjoy-sudoku) · [sudoku solver doku](https://appshunter.io/ios/topics/sudoku-solver-doku) · [sumoku](https://appshunter.io/ios/topics/sumoku) · [sudoku lite version](https://appshunter.io/ios/topics/sudoku-lite-version) · [good sudoku](https://appshunter.io/ios/topics/good-sudoku) · [sudoku anime 3d](https://appshunter.io/ios/topics/sudoku-anime-3d) · [sudoku solver scan](https://appshunter.io/ios/topics/sudoku-solver-scan) · [sudoku solver realtime camera](https://appshunter.io/ios/topics/sudoku-solver-realtime-camera) · [expert sudoku book stress free](https://appshunter.io/ios/topics/expert-sudoku-book-stress-free) · [uglysudoku](https://appshunter.io/ios/topics/uglysudoku)

---

*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 2026-09-01.*