# Sudoku: Classic & Variations — No ads. More fun.

> Classic and variant Sudoku puzzles with no ads and helpful gameplay features. (iPhone/iPad app by Conceptis Ltd..)

- Source: https://appshunter.io/ios/app/sudoku-classic-and-variations/id537201666 (this page in markdown: same URL + `.md`)
- Developer: [Conceptis Ltd.](https://appshunter.io/developer/479420055)
- Category: Games, Entertainment, Board, Puzzle
- Price: Free with in-app purchases
- Rating: 4.80/5 from 1,111 App Store ratings · 236 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.6 · 10 MB
- Languages: American English, Korean, Chinese (Simplified, China), Japanese
- Released: 2012-08-02
- Data updated: 2026-08-28
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/sudoku-classic-and-variations/id537201666/reviews.md

## What is Sudoku?

Play six different Sudoku variations in a single app! Start with classic Sudoku grids and advance to Diagonal Sudoku, Irregular Sudoku and OddEven Sudoku - each with a different look and a unique twist of brain challenging logic. Huge brain-bashing Mega Sudoku puzzles, also known as Monster Sudoku, are offered for iPad only.

With its diverse variations and straightforward no-frills game design, Conceptis Sudoku brings a new dimension to Sudoku mobile gaming - on both iPad and iPhone.

To help see the puzzle progress, graphic previews in the puzzle list show the progress of all puzzles in a volume as they are being solved. A Gallery view option provides these previews in a larger format.

For more fun, Sudoku contains no ads and includes a Weekly Bonus section providing an extra free puzzle each week.

PUZZLE FEATURES

• 160 free Classic Sudoku and Sudoku variant puzzles
• Variants include Mini, Diagonal, Irregular, OddEven and Mega
• Extra bonus puzzle published free each week
• Multiple difficulty levels from very easy to extremely hard
• Grid sizes up to 16x16
• Puzzle library continuously updates with new content
• Manually selected, top quality puzzles
• Unique solution for each puzzle
• Hours of intellectual challenge and fun
• Sharpens logic and improves cognitive skills

GAMING FEATURES

• No ads
• Unlimited check puzzle
• Unlimited hints
• Show conflicts during gameplay
• Unlimited Undo and Redo
• Pencilmarks feature for solving hard puzzles
• Autofill pencilmarks mode
• Highlight Excluded Squares option
• Lock number on keypad option
• Concurrently playing and saving multiple puzzles
• Puzzle filtering, sorting and archiving options
• Dark Mode support
• Graphic previews showing puzzles progress as they are being solved
• Portrait and landscape screen support (iPad only)
• Track puzzle solving times
• Backup & restore puzzle progress to iCloud

ABOUT

Conceptis Sudoku variations have also become popular under other names such as Sudoku by Dave Green, Sudoku 12x12, Sudoku 16x16, Jigsaw Sudoku, Nonomino Sudoku, Squiggly Sudoku, Sudoku X and many more. All puzzles in this app are produced by Conceptis Ltd. - the leading supplier of logic puzzles to printed and electronic gaming media all over the world. On average, more than 20 million Conceptis puzzles are solved each day in newspapers, magazines, books and online as well as on smartphones and tablets across the world.

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://www.conceptispuzzles.com/index.aspx?uri=info/doc/220

## Key features

- Six Sudoku variations
- No ads
- Weekly bonus puzzles
- Multiple difficulty levels
- Graphic puzzle previews
- Unlimited hints and undo
- Dark Mode support

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Diagonal Medium 1 | $1.99 | one-time |
| Irregular Medium 1 | $1.99 | one-time |
| Mega Medium 1 | $3.99 | one-time |
| Classic Easy 1 | $0.99 | one-time |
| Classic Medium 1 | $1.99 | one-time |
| Classic Hard 1 | $1.99 | one-time |
| Classic Devil 1 | $2.99 | one-time |
| Diagonal Hard 1 | $1.99 | one-time |
| Irregular Hard 1 | $1.99 | one-time |
| OddEven Hard 1 | $1.99 | one-time |
| OddEven Medium 1 | $1.99 | one-time |


## What do users think of Sudoku?

Overall sentiment: positive

**Pros**

- 👍 No ads
- 👍 Variety of puzzle types
- 👍 Intuitive interface
- 👍 Accurate difficulty ratings
- 👍 Ability to check for mistakes
- 👍 Helpful pencil mark features

**Cons**

- 🐛 Occasional crashes or freezes
- 💡 Desire for more free/cheaper puzzle packs
- 💡 Lack of dark mode option
- 💡 Wish for more daily/weekly free puzzles

**Commonly reported bugs**

- Crashes or freezes
- Incompatibility with older devices
- Lack of color blind support

**Most requested features**

- Dark mode option
- More free/variety puzzle packs
- Ability to discard used puzzles
- Hint feature to help when stuck
- Ability to highlight numbers in different colors
- Chain strategy explanation

## Recent user reviews (10 of 236)

All indexed reviews: https://appshunter.io/ios/app/sudoku-classic-and-variations/id537201666/reviews.md

### 5/5 — おもろい

*2026-08-04*

一生できます

### 4/5 — ヒントの説明がほしい！

*2026-07-11*

一手戻るとかヒントが無料で教えてもらえるとか優しい仕様だなぁと思うのですが、上級になってくるとヒントのロジックがわからなくてなんでそこに？と思ったら意味のわからないヒントをもらってもそれで進めたくないと思ってしまいます(笑)

**Developer response:** レビューいただきありがとうございます。よろしければ、詰まった箇所の画像を問い合わせメールにいただけましたら、できる範囲で回答させていただきます。

### 3/5 — 要望

*2026-07-10*

クラシックのデビル〜極に関しては解説をつけるべきだと思う。
理由はデビル〜極に手を出す人は極が余裕レベルの人か中上級者のはず。
しかし解説が無い事で学習もできない(特に上級者になりかけの人)→そこから進歩が出来ないから断念となるケースが非常に多いのではなかろうかと思う。
ぜひ検討してほしい。

**Developer response:** レビューいただきありがとうございます。画面右上⇒アシスタント機能で次の一手のヒントを見ることができます。難問問題の解説につきましては、社内で検討させていただきます。よろしくお願いいたします。

### 5/5 — 集中してできる

*2026-05-19*

初めて見たく何個かのゲームをやってみたが、考えている最中に広告が入り集中できるアプリが少なかったが、現状では広告が入らず集中してできると思います。

### 3/5 — Bad update

*2026-05-12, version 6.3*

Since I downloaded version 6.3, I haven’t been able to open any games in my library. I’m a long-time user, so I’m hoping you fix this quickly. Thanks

### 5/5 — 今までで1番

*2026-05-09*

本当に広告無しで最高のクオリティ。新作を心待ちにしてます🙏

### 5/5 — 最高

*2026-05-02*

いいね!

### 5/5 — 上達できました！

*2026-04-24*

他のアプリを使って、このアプリがどんなに良くできているか実感しました。広告無しで、間違いをすぐに知ることができる、行き詰まった時にヒントを見ることができる。入門から始めて上級パズルが解けるようになったのも、ストレスなく次の一手のヒントを見れるから。
メモ書きの間違いまで指摘してくれてありがたい限りです！操作性も抜群で、メモと確定数字の切り替えもサクサク！
マスに確定数字を入れたら、自動的に行や列のメモ数字を消してくれます。
本当に良いアプリです！ずっと使いたいです。ありがとう！

### 4/5 — new Format cumbersome

*2026-04-01, version 6.3*

After the last update, the format of the games has changed. It stretches the numbers to the bottom of the screen. It becomes more cumbersome to use a single finger to fill out the puzzle.

### 1/5 — 使いづらくなった

*2026-03-23*

シンプルな画面に慣れてたけどアップデートでうまく操作できなくなった。課金したばかりなのに残念

**Developer response:** その後のアップデートはいかがでしょうか。不具合が続くようでしたら、詳細を問い合わせメールにご連絡いただけましたらお調べさせていただきます。

## Frequently asked questions about Sudoku

### What is this app about?

This app offers a variety of Sudoku puzzles, including classic grids and unique variations like Diagonal, Irregular, and OddEven Sudoku. It provides a challenging mental workout with a straightforward, no-frills design and no advertisements.

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

Key features include six different Sudoku variations, 160 free puzzles with weekly bonuses, multiple difficulty levels, and grid sizes up to 16x16. It also offers unlimited hints, undo/redo, conflict highlighting, and Dark Mode support.

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

The app is free to download and includes a significant number of free puzzles. It also offers in-app purchases, suggesting that additional content or features may be available for purchase.

### What devices is this app compatible with?

The app is designed for both iPhone and iPad. Some features, like Mega Sudoku puzzles and portrait/landscape screen support, are specifically noted as being available on iPad only.

### Who would enjoy playing this Sudoku app?

This app is ideal for anyone who enjoys logic puzzles and brain teasers. It's particularly suited for those who appreciate a variety of Sudoku challenges, a clean interface without ads, and features that assist in solving more difficult puzzles.

## Version history (last 5 releases)

### 6.3 — 2026-03-21

This version improves performance and stability.

### 6.2 — 2025-10-24

This version improves performance and stability.

### 6.1 — 2025-08-06

This version improves performance and stability.

### 6.0 — 2025-03-19

This version improves performance and stability.

### 5.9 — 2024-12-10

This version improves performance and stability.

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| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Sudoku ∙ Classic Sudoku Games](https://appshunter.io/ios/app/sudoku-classic-sudoku-games/id1522685808) | 4.7 (23,088) | Free | Games |
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| [Sudoku· Classic Puzzle Games](https://appshunter.io/ios/app/sudoku-classic-puzzle-games/id1409781798) | 4.7 (63,544) | Free | Games |
| [Sudoku - Brain Puzzle Games](https://appshunter.io/ios/app/sudoku-brain-puzzle-games/id1442749804) | 4.8 (306,510) | Free | Games |
| [Sudoku: Variants & Classic](https://appshunter.io/ios/app/sudoku-variants-and-classic/id1530683853) | 4.8 (1,588) | Free | Games |
| [Sudoku & Art – No Ads](https://appshunter.io/ios/app/sudoku-and-art-no-ads/id1464413166) | 4.4 (2,786) | Free | Games |

## More apps by Conceptis Ltd.

- [Fill-a-Pix: Minesweeper Puzzle](https://appshunter.io/ios/app/fill-a-pix-minesweeper-puzzle/id479420052)
- [Pic-a-Pix: Nonogram Color](https://appshunter.io/ios/app/pic-a-pix-nonogram-color/id503132420)
- [Link-a-Pix: Nonogram Links](https://appshunter.io/ios/app/link-a-pix-nonogram-links/id517602670)
- [Hashi: Bridges](https://appshunter.io/ios/app/hashi-bridges/id567583852)
- [Nurikabe: Islands & Walls](https://appshunter.io/ios/app/nurikabe-islands-and-walls/id581912445)

All apps by Conceptis Ltd.: https://appshunter.io/developer/479420055

## Related topics

[sudoku variants](https://appshunter.io/ios/topics/sudoku-variants) · [variant sudoku](https://appshunter.io/ios/topics/variant-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 2026-08-28.*