Sudoku ′ vs ⋆Sudoku
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Sudoku ′
Engage with an unlimited supply of Sudoku puzzles, playable online or offline. This app offers six difficulty levels, daily challenges, and a clean, user-friendly interface designed for both novice and expert players. Enjoy a distraction-free experience with customizable settings and essential tools like undo/redo and note-taking.
- Unlimited Sudoku grids
- Offline play
- 6 difficulty levels
- Daily challenges
- Undo/Redo functionality
- Automatic and manual notes
- Conflict and error highlighting
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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 :)
⋆Sudoku
This app offers a classic Sudoku puzzle experience with a modern design and intuitive controls. It features five difficulty levels, a smart hint system that teaches logic, and daily challenges to keep your mind sharp. Track your progress and enjoy a customizable and relaxing gameplay.
- Smart hint system teaches logic
- Five difficulty levels
- Daily puzzle challenges
- Customizable board and themes
- Progress tracking and statistics
- Auto-fill and auto-check options
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Sudoku by Brainium has updated the classic Sudoku puzzle game you know and love, with a clean, modern design, calming backdrops, and intuitive controls. With endless number puzzles and five levels of difficulty, our Sudoku is perfect for players of all skill levels. Whether you’re in the mood for a quick game to help you relax, or an expert level logic challenge to train your brain, there’s a board for you. Brainium Sudoku also features the first and best smart hint system available. It goes beyond simply giving you the answers. Instead, it helps you learn and improve your skills by teaching you “why” the answer is what it is. With every puzzle, our “Hint” button provides the techniques you need to make progress even when it seems like your path is blocked. The instructions are easy to understand, unique for every puzzle, and presented with easy to follow, helpful animations and colorful visuals. This feature will improve your Sudoku skills whether you’re a first-time player or a seasoned expert. It’s the perfect companion for anyone looking to take their number game or logic puzzle skills to the next level. Enjoy a clear, easy to read, and customizable Sudoku board with visual guides that make reading the board and figuring out where to place your next numbers a breeze. Our input system is designed to make entering numbers and notes simple, and our user-friendly scoring system makes it easy to compete with yourself or friends. Starting and keeping a daily habit of mental exercise is easy by playing Sudoku’s Daily Puzzles, which are sure to keep your mind sharp and at ease. Track your progress with onboard statistics and unlock fun achievements along the way. Brainium’s Classic Sudoku Features: • The world’s most advanced Sudoku learning tool and hint system • Hints that teach you the logic behind the answer • Five perfectly balanced difficulty levels from beginner to expert • Daily Puzzle Challenges - complete them to earn points and gold checkmarks • Two beautiful grid styles • Nine relaxing backdrops • Light or dark grid fonts with adjustable size • Auto Light/Dark mode adjusts the theme based on your device settings • Unlimited collection of brain training logic puzzles • Game Statistics to track progress • Auto-Fill Notes option • Auto-Clear Notes option • Auto-Check Errors option • Number Painting option allows you to rapidly fill open squares with a selected number or note • Universal App looks great on iPhone and iPad • Global and friend leader boards • Portrait and landscape play options • Right or left-handed option in landscape • iPad keyboard compatible We hope Sudoku by Brainium brings you endless fun, relaxation, and a challenge for your mind. More Fun & Free Logic and Classic Card Games from Brainium: • Solitaire • Mahjong • Spider Solitaire • FreeCell • Pyramid • Blackjack Like us on Facebook http://www.facebook.com/BrainiumStudios Follow us on Twitter @BrainiumStudios Visit us on the web https://www.Brainium.com/
Screenshots
Verdict
Sudoku ′ and ⋆Sudoku both sit at 4.7 stars, but that hides the real split: 81% of Sudoku ′'s written reviews are positive against 64% of ⋆Sudoku's. Sudoku ′ also leads on iOS requirement (12.4 vs 15.0). ⋆Sudoku's advantage is update cadence (monthly vs every 3 months) and ratings volume (161K vs 39K). On price, rating, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Sudoku ′ sells 1 one-off in-app purchase and ⋆Sudoku sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.7 for Sudoku ′ against 4.7 for ⋆Sudoku. Both are backed by a comparable volume of ratings — 39K and 161K respectively. Written reviews are what separate them: 81% of Sudoku ′'s written reviews are positive against 64% of ⋆Sudoku's.
Sudoku ′ ships an update every 3 months, ⋆Sudoku monthly. Both last shipped on October 24, 2026.
| Parameter | Sudoku ′ | ⋆Sudoku |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (39K ratings) | 4.7 (161K ratings) — better |
| Positive reviews | 81.3% of reviews — better | 63.9% of reviews |
| Number of ratings | 39K | 161K — better |
| Update frequency | Every 3 months | Monthly — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.4 — better | 15.0 |
| Further details — not scored | ||
| Size | 6 MB | 316 MB |
| Age rating | 4+ | 4+ |
| Developer | Mind The Frog, Inc. | Brainium Studios LLC |
Customer experience
Sudoku ′
⋆Sudoku
User reviews
Sudoku ′
From 39K App Store ratingsWhat we love
- 👍 Easy to use
- 🧠 Challenging levels
- 🎨 Customizable colors
- 📝 Helpful note-taking feature
- 🔍 Number highlighting
Room to improve
- 🔍 Confusing note-taking behavior
- 🔍 Difficulty level jumps
- 🔍 Ads interrupting gameplay
- 🔍 Lack of progress tracking
- 🔍 Unstable on some devices
⋆Sudoku
From 161K App Store ratingsWhat we love
- 🚀 Challenging but not too challenging
- 👍 Great for learning advanced techniques
- 👍 Helpful hints that teach strategies
- 👍 Relaxing and soothing game
- 👍 Customizable themes and settings
Room to improve
- 🐛 Frequent crashes and glitches
- 🔍 Difficult to see numbers and patterns
- 🔍 Inconsistent difficulty levels
- 🔍 Overly distracting UI elements
- 🔍 Too many intrusive ads
Bugs and requests
Sudoku ′
Reported bugs
4 issues- Puzzle errors
- App crashes
- Incorrect number placement
- Sideways orientation on tablets
Requested features
5 requests- Ability to stay in note mode
- More granular difficulty levels
- Mute option for ads
- Progress tracking and statistics
- Improved stability on older devices
⋆Sudoku
Reported bugs
5 issues- Puzzle completion status not updating correctly
- Floating number feature not working as expected
- Scores not displaying properly on leaderboard
- Game freezing or crashing on certain devices
- Inability to play music in the background
Requested features
6 requests- Option to disable auto-check for errors
- Ability to customize number colors and backgrounds
- More granular difficulty settings between Hard and Expert
- Ability to access past daily puzzles
- Family sharing for ad-free version
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- Clearer explanation of scoring system
In-app purchases
Sudoku ′
- Remove Ads$1.99
⋆Sudoku
- Remove Ads$11.99








