# Sudoku: Classic Brain Puzzle — Keep your mind sharp!

> Classic Sudoku puzzle game with multiple difficulty levels and offline play. (iPhone/iPad app by UNICO STUDIO LLC.)

- Source: https://appshunter.io/ios/app/sudoku-classic-brain-puzzle/id1500326655 (this page in markdown: same URL + `.md`)
- Developer: [UNICO STUDIO LLC](https://appshunter.io/developer/1467451326)
- Category: Games, Casual, Puzzle
- Price: Free with in-app purchases
- Rating: 4.70/5 from 1,372 App Store ratings · 163 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 183 MB
- Languages: American English, Arabic, Czech, French (France), German (Germany), Indonesian, Italian, Japanese, Korean, Malay and 9 more
- Released: 2020-07-03
- Data updated: 2026-09-11
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/sudoku-classic-brain-puzzle/id1500326655/reviews.md

## What is Sudoku?

Easy sudoku free puzzle game is an addictive brain sudoku puzzle game for very beginners and advanced players. Whether you'd like to relax or keep the mind active, you can pleasantly pass the time with classic sudoku free games! From the creators of Brain Test Tricky Puzzles, Brain Test 2 Tricky Stories and Who Is? Tricky Riddles! This game is a new game and an offline game. 

This Classic Sudoku is the puzzle game for your memory, brain, logical thinking and a good time killer! Different sudoku puzzles come in five difficulty levels. You can play very easy sudoku puzzles or very hard sudoku puzzles: Novice Sudoku, Easy Sudoku, Medium Sudoku, Hard Sudoku, and Expert Sudoku! You will find all you need whether you are solving your first sudoku or you've progressed to expert difficulty. Choose any difficulty level you like! Brain games and IQ games are for improving the brain. 

This game is a sudoku brain game. It is not soduko, suduko, sudoko or soduku. It is sudoku :)

Challenge your brain anywhere, anytime!

Features:
● Sudoku free games and hundreds of unique challenges!
● More than 5000 classic well-formed sudoku puzzles for free.
● 5 perfectly balanced levels of difficulty. More than 1000 very easy levels.
● Free and offline. Brain games for adults, puzzle games and new games. 
● You can take notes to find the numbers easily as on paper. Each time you fill in a cell, notes are automatically updated!
● Statistics: Track your progress for each difficulty level: analyze your best time and other achievements.
● Gorgeous color themes! Play with more comfort, even in the dark theme! 
● New games and free games are fun if they help to improve the brain and mind.
● Simple and intuitive design
● Great exercise for the brain
● When you are stuck, the hint button can guide you.
● Free offline games and nice games.
● Track your progress visually with the progress bar.
● Made a mistake? Use unlimited Undos or use Eraser.
● Input buttons are dimmed if a number is used 9 times (or more) in the Sudoku puzzle.
● Support both phones and tablets.	
● Auto-save. If you leave the sudoku game unfinished, it will be saved. You can continue playing anytime.

Optional help functions:
● A column, row or block containing only 1 empty cell will be auto-completed.
● Challenge yourself by figuring out your mistakes, or enable auto check for mistakes feature to see your errors.
● Highlight duplicates to avoid repeating numbers in a row, column and block.	
● When you select a cell, related row, column, and box are highlighted.
● When you select a cell with a number, the same numbers on board are highlighted.

This is the sedoku app for soduku lovers. If you like to play sodoku game, you should download the sudoko game. We offer 5 difficulty levels. We add new sodoku puzzles frequently. Download now and play suduku!
Have fun!

## Key features

- Hundreds of unique Sudoku challenges
- 5 difficulty levels
- Offline play
- Note-taking feature
- Progress tracking and statistics
- Customizable color themes
- Hint and Undo options

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Ads | $5.99 | one-time |
| Sale Remove Ads | $2.99 | one-time |
| Hint Pack | $2.49 | one-time |


## What do users think of Sudoku?

Overall sentiment: negative

**Pros**

- 👍 Classic gameplay
- 💡 Notes feature to distinguish inputs
- 💡 Countdown of remaining numbers

**Cons**

- 🔍 Frequent and disruptive ads during gameplay
- 🔍 Ads with inappropriate content
- 🐛 Crashes and freezes
- 🔍 Loud audio from required ads
- 🐛 Sensitive controls leading to mistakes
- 🔍 Inability to play without sound

**Commonly reported bugs**

- Game crashes and freezes
- Inability to exit ads without losing progress
- Incompatibility with older devices

**Most requested features**

- Option to pay for ad-free experience
- Ability to pause game during ads
- Customizable board and UI themes
- Improved game mechanics and controls

## Recent user reviews (10 of 163)

All indexed reviews: https://appshunter.io/ios/app/sudoku-classic-brain-puzzle/id1500326655/reviews.md

### 1/5 — 落ち着いて出来ない

*2026-08-06*

500円課金しても3回タップ間違えしたら公告見てみたいな仕組み。しかもとってもしつこい公告。タブレットだからふと触ってしまったりすることもあるしホント嫌な仕組み。

### 4/5 — Good game, easy functions

*2026-07-14*

I would give it 5 but the ads…. Which I know are necessary 😵‍💫😊but lolol. I like that it’s easy to play and go from number to notes without mistakes that can be annoying. Have a few sudoku but this is my go to.

**Developer response:** Thank you for the thoughtful review and for choosing our game as your go‑to! We know ads can be a bit much; their revenue helps us keep the game free while we improve it. We’ll keep refining the experience so it stays easy, relaxing, and fun to play 🎮🌟

### 1/5 — 広告

*2026-03-22, version 1.2.46*

長い広告を閉じた後、1秒くらいで閉じれる広告が3回出てくる。

### 1/5 — 광고에 미친 게임

*2026-03-10*

광고도 적당히 나와야 게임을 하지 누구나 만들수있는 스도쿠 어플에 광고만 덕지덕지

**Developer response:** 여기요! 우리 앱을 확인하고 피드백을 제공해 주셔서 진심으로 감사드립니다. 광고 균형에 대한 귀하의 의견을 이해합니다. 우리의 목표는 개발을 지원하면서 게임에 대한 접근성을 유지하는 것입니다. 우리는 곧 더 나은 경험을 제공하기 위해 광고 빈도를 최적화하기 위해 노력하고 있습니다. 우리와 함께해주셔서 감사합니다! 지원 이메일은 support@unicostudio.co입니다.

### 2/5 — No hints

*2026-03-07, version 1.2.46*

I like this game! But I’m a little disappointed that the hint button doesn’t work. I bought the 10 hints pack and i can’t even use them.

### 1/5 — 廣告真的太多

*2026-02-15, version 1.2.46*

能理解免費遊戲多多少少有些廣告正常，但我一局都還沒玩完就跳廣告？讓人很煩躁

### 1/5 — Too many ads- most XXX

*2026-02-06, version 1.2.46*

My problem with this game is the ads- ad when you pause a game, an ad every 4 minutes during the game & an ad when you win a game. Not only is that too many ads, but they are gross. STOP SHOWING DISGUSTING “GALATEA” BEASTIALITY PORN ADS!!! I see both of these issues mentioned in other reviews going back 6 months are addressed by you so you’re both aware & have had time to address if you cared to. I know ad revenue makes the game possible but how much are you making off those players deleting the game BECAUSE of the ad frequency. Before & after a game (while excessive) is understandable, but during the game is disrespectful to the player as it interrupts your concentration & overall enjoyment of the game. If your current ad network doesn’t allow for control over ad content, find a new ad network! Remember that everything a player encounters while interacting with your product represents you! If you are fine being associated with porn where humans are copulating with wolves and dragons then by all means continue passively standing by but change your age rating from the 4+ years that is currently being promoted!!!

### 5/5 — 頭の中

*2026-01-20*

中々難しい😓けど頭の中が凄く回転しているので出来た時スッキリします。

### 4/5 — Really Fun, but…

*2026-01-17*

The ads that this app shows open pop-up windows to my phone browser that read things like “Your phone has viruses!” and “Unmute your phone to earn your reward.” I enjoy the gameplay, but I would appreciate if the ads were screened or not spammy/dangerous.

**Developer response:** Sorry to hear this. Normally it shouldn’t happen. Although we don't have control over the content of the ads which are served by ad networks, we have the ability to block certain ad categories. Please share the screenshot of the ads with us at support@unicostudio.co.

### 1/5 — Why

*2025-12-23, version 1.2.46*

Fnck

## Frequently asked questions about Sudoku

### What is this app?

This app is a classic Sudoku puzzle game designed to keep your mind sharp. It offers a large collection of puzzles suitable for both beginners and advanced players, allowing you to relax or challenge your brain.

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

Key features include over 5000 classic Sudoku puzzles, five balanced difficulty levels, offline play, a note-taking function, progress statistics, customizable color themes, and helpful functions like hints and unlimited undos.

### Is this app free to play?

Yes, the app offers free Sudoku games with hundreds of unique challenges. It also includes optional in-app purchases and advertisements.

### Can I play this game offline?

Yes, this game is an offline game, meaning you can play it anywhere, anytime without an internet connection. It's a great option for brain games for adults and puzzle games on the go.

### Who is this app for?

This app is for anyone who enjoys Sudoku or wants to improve their memory, brain, and logical thinking skills. It caters to all levels, from very beginners to expert Sudoku players.

## Version history (last 5 releases)

### 1.2.46 — 2025-03-21

Bug fixes and performance improvements.

### 1.2.45 — 2024-11-20

Bug fixes and performance improvements.

### 1.2.43 — 2024-08-27

Bug fixes and performance improvements.

### 1.2.40 — 2024-08-15

Bug fixes and performance improvements.

### 1.2.39 — 2024-07-05

Bug fixes and performance improvements.

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## More apps by UNICO STUDIO LLC

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All apps by UNICO STUDIO LLC: https://appshunter.io/developer/1467451326

## Related topics

[sudoku classic brain puzzle](https://appshunter.io/ios/topics/sudoku-classic-brain-puzzle)

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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 2026-09-11.*