# Sudoku - Classic & Killer — Free Offline Brain Number Game

> Classic Sudoku puzzle game with multiple difficulties and offline play. (iPhone/iPad app by One Up Games Studio.)

- Source: https://appshunter.io/ios/app/sudoku-classic-and-killer/id1479393086 (this page in markdown: same URL + `.md`)
- Developer: [One Up Games Studio](https://appshunter.io/developer/1348244383)
- Category: Games, Entertainment, Puzzle, Trivia
- Price: Free with in-app purchases
- Rating: 4.60/5 from 141 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 185 MB
- Languages: American English, Afrikaans, Arabic, Basque, Belarusian, Bulgarian, Catalan, Czech, Danish, Dutch and 30 more
- Released: 2019-10-01
- Data updated: 2026-08-17
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/sudoku-classic-and-killer/id1479393086/reviews.md

## What is Sudoku?

Train your brain with the ultimate Sudoku experience. Thousands of classic number puzzles, anytime, anywhere, fully offline.

Sudoku - Classic & Killer is a polished Sudoku built for iPhone and iPad, designed for quick daily sessions and deep logic training. Whether you are discovering number puzzles for the first time or chasing a personal best on Expert, there is a difficulty and a mode made for you.

SUDOKU FOR EVERY SKILL LEVEL
- Five difficulties: Easy, Medium, Hard, Expert and Master
- Over 10,000 handcrafted puzzles, each with a single unique solution
- New puzzles added every week
- Daily Challenge with monthly trophies to collect
- Killer Sudoku mode for an extra layer of logic

SMART FEATURES THAT HELP YOU IMPROVE
- Pencil notes to track candidates, just like on paper
- Auto-notes and auto-check to speed up your solving flow
- Explanatory hints that teach technique, not just the answer
- Duplicate highlighting to spot mistakes instantly
- Unlimited undo, redo, pause and resume

A CLEAN, RELAXING DESIGN
- Minimalist interface built for focus
- Light and dark themes for day and night
- Adjustable number size and colour accents
- Distraction-free board with smooth animation
- Sound effects you can switch off

TRACK YOUR PROGRESS
- Detailed statistics for every difficulty
- Personal bests, streaks and win rates
- Progress charts as your logic sharpens
- Achievements and milestones

PLAY ANYWHERE
- Fully offline, no connection required
- Made for commutes, flights, waiting rooms and bedtime
- Auto-save, so you never lose a puzzle in progress
- Built for iPhone and iPad, portrait and landscape

WHY PLAY EVERY DAY
Sudoku is a daily workout for your attention. Regular play sharpens memory, builds concentration and gives you that small, satisfying win that makes the rest of the day run smoother.

Download Sudoku - Classic & Killer and start your first puzzle in seconds.

## Key features

- Classic Sudoku gameplay
- Multiple difficulty levels
- Hints and notes system
- Offline mode
- Statistics and progress tracking
- Customizable themes

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/sudoku-classic-and-killer/id1479393086/reviews.md

### 5/5 — Very challenging sudoku  ‌‌   ‌

*2022-07-15, version 3.6*

Best Sudoku game ever. Most challenges, events & awesome daily challenges!!!! Absolutely ❤️ ❤️ ❤️ this game most (and tried just about all) Very fun!!!! Brings back memories!!

### 4/5 — Review

*2022-01-10*

Solid game and good when have nothing else to do, requires internet so not 5

### 5/5 — Really like Sudoku

*2021-07-21, version 3.0*

It's a great idea for making you smart . Great experience and you can play anytime anywhere. Superb sudoku setting

### 5/5 — Great Application

*2020-06-18*

Great application!
 

 It would be nice to have an option to auto fill the pencil marks.

## Frequently asked questions about Sudoku

### How do I play Sudoku Classic?

Place digits 1-9 into each grid cell so each number appears only once in each row, column, and 3x3 sub-grid. Use hints and notes to track potential moves.

### Can I play Sudoku Classic offline?

Yes, Sudoku Classic offers an offline mode, making it perfect for playing anytime, anywhere, such as during travel or commutes.

### What difficulty levels are available in Sudoku Classic?

Sudoku Classic offers multiple difficulty levels, including Easy, Medium, Hard, and Expert, catering to both beginners and advanced players.

### Does Sudoku Classic have ads?

Yes, the app is free to play and is supported by ads, as indicated by its monetization model.

### How often is Sudoku Classic updated?

The latest version is 4.7, and the app was last updated on July 23, 2025, suggesting regular updates.

### What devices can I play Sudoku Classic on?

Sudoku Classic is available on iPhone, iPad, and iPod, supporting a wide range of Apple mobile devices.

### What is the age rating for Sudoku Classic?

Sudoku Classic has an age rating of 4+, making it suitable for a broad audience of players.

### Does Sudoku Classic offer hints or a way to track progress?

Yes, Sudoku Classic includes a hints and notes system to help with tricky puzzles and provides statistics and progress tracking to monitor your performance.

## Version history (last 5 releases)

### 4.9 — 2026-08-08

Thanks for playing Sudoku.

- Fresh puzzles added across all five difficulties
- Daily Challenge improvements and new monthly trophies
- Faster load times and smoother animation on every device
- Interface polish for a cleaner, easier-to-read board
- Bug fixes based on your reports, thank you for sending them

Still here, as always:
- 10,000+ handcrafted puzzles with a single unique solution
- Killer Sudoku mode
- Pencil notes, auto-notes and explanatory hints
- Unlimited undo and auto-save
- Full offline play

Enjoying the game? A rating or a review on the App Store helps a small team like ours more than you would think.

Found a bug or have an idea? Tap Support inside Settings. We read every message.

### 4.8 — 2026-04-24

Welcome to Sudoku - Classic Number Games, built from the ground up for iOS.

What's inside this release:
- 10,000+ handcrafted puzzles across 5 difficulty levels
- Daily Challenge with monthly trophies
- Killer Sudoku mode for extra logic fun
- Smart hints that teach solving technique, not just answers
- Pencil notes and auto-notes for faster solving
- Clean light and dark themes
- Full offline play — no internet needed
- Auto-save on every puzzle
- Detailed statistics and personal bests

We're shipping improvements every few weeks based on your feedback. If you spot something we can do better, tap "Support" inside Settings — we read every message.

Thank you for playing. Happy solving!

### 4.7 — 2025-07-23

Performance and memory management enhancements to improve the gaming experience.
Keep having fun and improving your mental capacity doing Sudokus!

### 4.6 — 2025-02-14

Fixed minor bugs and added improvements to the game logic.
Keep enjoying and training your brain with this fantastic Sudoku game!

### 4.5 — 2024-08-28

In this version we have made some logical improvements and fixed minor bugs.
Now without ads!!
Keep having fun with this fantastic Sudoku game!

## Apps similar to Sudoku

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Sudoku· Classic Puzzle Games](https://appshunter.io/ios/app/sudoku-classic-puzzle-games/id1409781798) | 4.7 (63,196) | Free | Games |
| [Sudoku - Brain Puzzle Games](https://appshunter.io/ios/app/sudoku-brain-puzzle-games/id1442749804) | 4.8 (305,146) | Free | Games |
| [Sudoku & Art – No Ads](https://appshunter.io/ios/app/sudoku-and-art-no-ads/id1464413166) | 4.4 (2,786) | Free | Games |
| [Sudoku.com - Number Games](https://appshunter.io/ios/app/sudokucom-number-games/id1193508329) | 4.8 (1,843,599) | Free | Games |
| [Sudoku - Classic Sudoku Games](https://appshunter.io/ios/app/sudoku-classic-sudoku-games/id1242854141) | 4.8 (20,427) | Free | Games |
| [Sudoku Classic -Offline Puzzle](https://appshunter.io/ios/app/sudoku-classic-offline-puzzle/id1444261450) | 4.6 (1,000) | Free | Games |

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All apps by One Up Games Studio: https://appshunter.io/developer/1348244383

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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 2026-08-17.*