Best Sudoku 21A Apps & Games

221+ iOS apps & games curated and reviewed

4.5 avg rating
19 free apps & games
Updated April 2026

Every iPhone needs a few good sudoku 21a apps. We benchmark 221+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.

Top Picks for Sudoku 21A

Sudoku 21A#1

Sudoku 21A by David Barbero Carbonell

Sudokus with friends
Editor's Choice
🎮 Games
1.0(2 ratings)
FreeAds
Sudoku 21A screenshot 1
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This free Sudoku app challenges your brain with six levels of difficulty and two game modes: individual and multiplayer, allowing you to compete against yourself or friends online. With infinite combinations, clues, and customizable features, download the app to experience Sudoku like never before and share it with friends for maximum fun!

⋆Sudoku#2

⋆Sudoku by Brainium Studios LLC

Classic Sudoku Logic Puzzles
Strong Contender
🎮 Games
4.7😐(161K ratings)
FreeAdsIn-App Purchases
⋆Sudoku screenshot 1
⋆Sudoku screenshot 2
⋆Sudoku screenshot 3
⋆Sudoku screenshot 4
⋆Sudoku screenshot 5
⋆Sudoku screenshot 6

Immerse yourself in the world of classic Sudoku puzzles with an updated, user-friendly app that offers various difficulty levels, helpful hints, beautiful design, and daily challenges to keep your mind sharp. Perfect for beginners and experts alike, this app provides endless fun and relaxation while enhancing your logic and problem-solving skills. Challenge yourself today!

What We Love

  • 🚀 Challenging but not too challenging
  • 👍 Great for learning advanced techniques
  • 👍 Helpful hints that teach strategies
  • 👍 Relaxing and soothing game

Room to Improve

  • 🐛 Frequent crashes and glitches
  • 🔍 Difficult to see numbers and patterns
  • 🔍 Inconsistent difficulty levels
Sudoku ▦#3

Sudoku ▦ by Tripledot Studios Limited

Sudoku (Soduku) Brain Puzzles
Worth Considering
🎮 Games
4.7😐(104K ratings)
FreeAds
Sudoku ▦ screenshot 1
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Sudoku ▦ screenshot 6

Play Sudoku puzzles on your phone with thousands of free, well-formed challenges. Enjoy a classic Sudoku experience with features like hints, mistake checking, and customizable difficulty levels. Challenge yourself or relax with this timeless brain-teaser.

What We Love

  • 🎮 Great game
  • 💡 Challenging levels
  • 📊 Useful statistics and insights
  • 🧠 Brain-stimulating

Room to Improve

  • 🤖 Too many ads
  • 🕰️ Ads disrupt gameplay
  • 🔇 Loud ads disrupt audio

More Sudoku 21A apps to explore

4
Sudoku Puzzle - Brain Games
Sudoku Puzzle - Brain Games
Sudoku Puzzle - Brain Games
Classic Sudoku & Math Games
Free

Challenge your mind with our stimulating Sudoku Puzzle app. Exercise your brain with endless puzzles and various difficulty levels. Download now and test your problem-solving skills!

🎮 Games
(80K)
5
Sudoku - Brain Puzzle Games
Sudoku - Brain Puzzle Games
Sudoku - Brain Puzzle Games
Jeux de Sudoku quotidiens
Free

Enjoy 5000 challenging Sudoku puzzles of varying difficulties every day with this addictive brain puzzle game. Test your logic and memory skills while having a great time - download now for iPhone!

🎮 Games
(299K)
6
Sudoku・
Sudoku・
Sudoku・
by Optime Software LLC
Free

Embark on a Sudoku journey set in feudal Japan with an iOS app offering dual keypad entry, smart notes, error checking, and multiple difficulty levels. Download now for free and experience Sudoku as it should be played!

🎮 Games
(11K)
7
Sudoku - Classic Sudoku Games
Sudoku - Classic Sudoku Games
Sudoku - Classic Sudoku Games
Sudoku (Soduku) Brain Puzzles
Free

Enjoy endless free Sudoku puzzles with hints and notes for all difficulty levels. Train your brain with this intuitive and polished Sudoku game that offers a challenge or assistance to suit your style. Start playing now!

🎮 Games
(19K)
8
Sudoku (Full Version)
Sudoku (Full Version)
Sudoku (Full Version)
by genina.com
Free

Experience the ultimate Sudoku app with 4 difficulty levels, various input modes, intelligent hints, and the ability to track your progress online through competitions and high scores. Never lose your progress with auto-save and enjoy a seamless puzzle-solving experience. Connect with our support team for any queries or feedback. Follow us on social media for updates and visit our website to start playing now!

🎮 Games
(8.4K)
9
Sudoku ′
Sudoku ′
Sudoku ′
Sudoku free of distraction
Free

A classic number puzzle game app for Sudoku enthusiasts of all levels with unlimited grids, 6 difficulty levels, daily challenges, and user-friendly design. Features include fast gameplay, small storage footprint, intuitive interface, and a variety of customizable options. Available on all Apple devices. Send feedback or request features to help@mindthefrog.com.

🎮 Games
(37K)
10
Sudoku - No ads
Sudoku - No ads
Sudoku - No ads
sudoku solver & sudoku classic
Free

Resolve Sudoku puzzles effortlessly with this ad-free solver app. Enjoy a distraction-free experience while tackling challenging puzzles. Download now and master Sudoku with ease.

📚 Education
(3.5K)
11
Sudoku
Sudoku
Sudoku
by Mighty Mighty Good Games
$2.99

Join millions of fans and dive into a world of Sudoku puzzles with over 1000 unique challenges on iPhone. Enjoy features like hints, multiple color schemes, and smart options for a fulfilling puzzle-solving experience. Challenge yourself with different skill levels or try Color Sudoku and Expert Sudoku for more variations and fun twists!

🎮 Games
(556)
12
Sudoku Puzzle World
Sudoku Puzzle World
Sudoku Puzzle World
Beautiful Sudoku Puzzles!
Free

Enjoy stunning Sudoku puzzles with beautiful backgrounds and simple gameplay in this amazing app. Try it now for free and experience classic Sudoku fun on your device!

🎮 Games
(20K)
13
Sudoku: Train Brain Puzzles
Sudoku: Train Brain Puzzles
Sudoku: Train Brain Puzzles
Play Sudoku, enjoy the logic!
Free

Train your brain with this Sudoku puzzle game that offers over 20,000 unique puzzles and 8 difficulty levels. Enjoy features like Smart Hints, Pencil Mode, and offline play. Start playing now for a fun and challenging experience!

🎮 Games
(17K)
14
Sudoku - Daily Puzzles
Sudoku - Daily Puzzles
Sudoku - Daily Puzzles
Daily Sudoku Puzzles Game
Free

Play challenging daily Sudoku puzzles with varying difficulty levels, thousands of free unique levels, and helpful features like notes and boosters. Train your brain, compete with others worldwide, and enjoy a stimulating puzzle experience both online and offline. Install now and sharpen your Sudoku skills!

🎮 Games
(3.7K)
15
Sudoku· Classic Puzzle Games
Sudoku· Classic Puzzle Games
Sudoku· Classic Puzzle Games
Logic Puzzle Math Number Games
Free

Enjoy the classic Sudoku game for free with varying difficulty levels, hints, and features like pencil marks and error correction. Train your brain daily, solve puzzles offline, and save your progress to continue later. Start playing Sudoku today!

🎮 Games
(60K)
16
Sudoku :)
Sudoku :)
Sudoku :)
Soduku Logic Puzzle Card Game
Free

Train your brain anytime, anywhere with this classic Japanese logic puzzle game. Play Sudoku on your mobile device for a challenging and fun experience that sharpens your mind.

🎮 Games
(58K)
17
Sudoku·
Sudoku·
Sudoku·
High Quality Sudoku Cards
Free

Pass the time and challenge your mind with this classic Sudoku game featuring daily challenges, four levels of difficulty, note-taking abilities, hints, and more. Download now for mind-challenging fun!

🎮 Games
(17K)
18
Sudoku by Staple Games
Sudoku by Staple Games
Sudoku by Staple Games
by Staple Games
Free

Exercise your mind with our official Sudoku puzzle game! Fill the grid with numbers 1-9 in each row, column, and sub-grid. Enjoy daily challenges, multiple levels, note-taking features, hints, and more. Download now for some brain-teasing fun!

🎮 Games
(100K)
19
Sudoku: Number Puzzle Game!
Sudoku: Number Puzzle Game!
Sudoku: Number Puzzle Game!
Train your brain, Math puzzle
Free

Play the ultimate Sudoku puzzle game with 15,000 games and various difficulty levels. Enjoy daily challenges, different themes, hints, and more to enhance your gaming experience. Start training your brain now!

🎮 Games
(22K)
20
Sudoku ◆
Sudoku ◆
Sudoku ◆
Sudoku Logic Puzzle Card Game
Free

Experience the ultimate Sudoku game with customizable boards and multiple difficulty levels, perfect for beginners and experts alike. Track your progress, improve your skills, and challenge yourself with relaxing or challenging puzzles. Download now and start playing!

🎮 Games
(18K)