Best Classic Sudoku Online Apps & Games

228+ iOS apps & games curated and reviewed

4.7 avg rating
20 free apps & games
Updated July 2026

Whether you're new to classic sudoku online or looking for an upgrade, our curated collection of 228+ iOS apps and games has something for everyone. Each app is reviewed and rated by real users, helping you make an informed decision.

Compare top Classic Sudoku Online Apps & Games (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Classic Sudoku OnlineClassic Sudoku OnlineFree5.0★ (1)YesYesMay 2026
2⋆Sudoku⋆SudokuFree4.7★ (161K)YesYesAug 2026
3Sudoku - Brain Puzzle GamesSudoku - Brain Puzzle GamesFree4.8★ (304K)YesYesAug 2026
4Sudoku Puzzle - Brain GamesSudoku Puzzle - Brain GamesFree4.9★ (87K)YesYesAug 2026
5▻Sudoku - Classic Brain Game▻Sudoku - Classic Brain GameFree4.8★ (658K)YesYesAug 2026
6Sudoku - Classic Sudoku GamesSudoku - Classic Sudoku GamesFree4.8★ (20K)YesNoAug 2026
7Sudoku ◆Sudoku ◆Free4.6★ (18K)YesYesAug 2026
8Sudoku :)Sudoku :)Free4.7★ (59K)YesYesAug 2026

Top Picks for Classic Sudoku Online

Classic Sudoku Online#1

Classic Sudoku Online by Tran Viet

Brain Game Online
Editor's Choice
🎮 Games
5.0(1 ratings)
FreeAdsIn-App Purchases
Classic Sudoku Online screenshot 1
Classic Sudoku Online screenshot 2
Classic Sudoku Online screenshot 3
Classic Sudoku Online screenshot 4
Classic Sudoku Online screenshot 5

Engage in a competitive online puzzle game where players race to complete a picture. This game requires a stable internet connection to participate in matches and challenge other players.

⋆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

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.

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 - Brain Puzzle Games#3

Sudoku - Brain Puzzle Games by Oakever Games

Sudoku - Math Puzzles
Worth Considering
🎮 Games
4.8😐(304K ratings)
FreeAdsIn-App Purchases
#52in Games
Sudoku - Brain Puzzle Games screenshot 1
Sudoku - Brain Puzzle Games screenshot 2
Sudoku - Brain Puzzle Games screenshot 3
Sudoku - Brain Puzzle Games screenshot 4
Sudoku - Brain Puzzle Games screenshot 5
Sudoku - Brain Puzzle Games screenshot 6

Engage your mind with over 5,000 classic Sudoku puzzles across multiple difficulty levels. Enjoy daily challenges, smart hints, and customizable themes for a stress-free, offline gaming experience. Compete globally and explore new puzzle types.

What We Love

  • 🚀 Fun game with different difficulty levels
  • 👍 Minimal ads between games
  • 🧠 Challenges the mind
  • 🌟 Useful features like pencil mode and hints

Room to Improve

  • 🔍 Unclear purpose of tickets
  • 🔀 Automatic number selection in map mode
  • 🔧 Auto-complete feature changed to on/off

More Classic Sudoku Online apps to explore

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

Engage your mind with a classic Sudoku puzzle game offering thousands of challenges across four difficulty levels. Features include note-taking, auto-check, daily challenges, and hints to aid your brain training.

Thousands of Sudoku puzzlesFour difficulty levels (Easy, Medium, Hard, Expert)Note-taking mode
🎮 Games
(87K)
free with in-app purchases
5
▻Sudoku - Classic Brain Game
▻Sudoku - Classic Brain Game
▻Sudoku - Classic Brain Game
Logic puzzles & Mind games
Free

Experience Sudoku with a unique point system, track your progress with runs, and compete globally on leaderboards. Enjoy thousands of free puzzles with adjustable difficulty and customizable looks.

Smart point systemOnline leaderboardsTrack game runs
🎮 Games
(658K)
free with in-app purchases
6
Sudoku - Classic Sudoku Games
Sudoku - Classic Sudoku Games
Sudoku - Classic Sudoku Games
Sudoku (Soduku) Brain Puzzles
Free

Engage your mind with a classic Sudoku puzzle game offering an endless supply of challenges. Choose from four difficulty levels and utilize helpful tools like hints and auto-check to enhance your gameplay experience. Train your brain anytime, anywhere with this intuitive and polished application.

Endless free Sudoku puzzlesFour difficulty levelsHints
🎮 Games
(20K)
ad-supported
7
Sudoku ◆
Sudoku ◆
Sudoku ◆
Sudoku Logic Puzzle Card Game
Free

Engage in a classic logic puzzle experience with an endless supply of Sudoku challenges. This app offers a sleek, modern interface designed for relaxing brain exercise, allowing you to hone your deduction skills and improve concentration. Track your progress, earn stars, and enjoy customizable gameplay across all your devices.

Endless Sudoku puzzlesCustomizable board and colorsHints, notes, and auto-complete
🎮 Games
(18K)
free with in-app purchases
8
Sudoku :)
Sudoku :)
Sudoku :)
Soduku Logic Puzzle Card Game
Free

Engage your mind with this classic Japanese logic puzzle. Offers multiple difficulty levels, customizable backgrounds, and unique emoji number options. Track progress and compete with others.

Four difficulty settingsCustomizable background colorsEmoji number option
🎮 Games
(59K)
free with in-app purchases
9
Sudoku - No ads
Sudoku - No ads
Sudoku - No ads
sudoku solver & sudoku classic
Free

Engage in a classic Sudoku experience with multiple difficulty levels suitable for all ages. Enjoy a clean interface, track your game history, and access unlimited solutions with a yearly subscription.

Multiple difficulty levelsBeautiful and concise interfaceGame history tracking
📚 Education
(4.1K)
subscription
10
Sudoku ▦
Sudoku ▦
Sudoku ▦
Sudoku (Soduku) Brain Puzzles
Free

Enjoy the classic paper-and-pencil puzzle game on your phone with a clean, elegant design. Challenge your mind with multiple difficulty levels and helpful tools to aid your solving experience.

Thousands of free puzzlesClassic Sudoku designPencil mode for notes
🎮 Games
(104K)
free with in-app purchases
11
Sudoku Puzzle World
Sudoku Puzzle World
Sudoku Puzzle World
Beautiful Sudoku Puzzles!
Free

Experience a visually stunning and classic Sudoku game with endless free puzzles. Choose from four difficulty levels and enjoy a vast collection of beautiful background images. Compete with others through Game Center achievements and leaderboards.

Endless free Sudoku puzzlesFour difficulty levelsGame Center integration
🎮 Games
(20K)
free with in-app purchases
12
Sudoku: Train Brain Puzzles
Sudoku: Train Brain Puzzles
Sudoku: Train Brain Puzzles
Play Sudoku, enjoy the logic!
Free

Engage in a classic Sudoku puzzle game designed to relieve stress and sharpen cognitive skills. Offers a vast library of puzzles with adjustable difficulty levels and helpful tools for both beginners and experts. Enjoy daily challenges and collect virtual rewards.

Over 20,000 unique Sudoku puzzlesDaily challenges with exclusive rewards8 difficulty levels (6x6 to 16x16)
🎮 Games
(17K)
subscription
13
Sudoku - Classic Math Games
Sudoku - Classic Math Games
Sudoku - Classic Math Games
Sudoku Puzzle and Brain Games
Free

This classic sudoku puzzle game offers a clean, eye-friendly interface with large numbers and adjustable difficulty levels for all ages. Enhance your brain training and problem-solving skills with helpful features like auto-complete, hints, and note-taking.

Large, eye-friendly numbersMultiple difficulty levelsAuto-complete and hints
🎮 Games
(4.8K)
free with in-app purchases
14
Sudoku : Daily Fun Puzzle Game
Sudoku : Daily Fun Puzzle Game
Sudoku : Daily Fun Puzzle Game
Classic Brain Number Challenge
Free

This classic number puzzle game offers thousands of Sudoku challenges for all skill levels. Train your brain, improve logical thinking, and enjoy a stimulating break with daily challenges and helpful tools. Play anytime, anywhere, and track your progress.

Multiple difficulty levelsDaily challenges and trophiesPencil mode
🎮 Games
(2.3K)
free with in-app purchases
15
Sudoku· Classic Puzzle Games
Sudoku· Classic Puzzle Games
Sudoku· Classic Puzzle Games
Logic Puzzle Math Number Games
Free

This app offers a comprehensive Sudoku experience with thousands of puzzles across multiple difficulty levels. It includes features like hints, step-by-step help, customizable gameplay, and offline play. Track your progress, unlock achievements, and explore classic and modern Sudoku variations.

Unlimited Sudoku puzzlesDaily Sudoku challengesHints and step-by-step help
🎮 Games
(63K)
free with in-app purchases
16
Sudoku (Full Version)
Sudoku (Full Version)
Sudoku (Full Version)
by genina.com
Free

This app offers a digital Sudoku experience with multiple difficulty levels and input modes. It includes features like pencil marks, intelligent hints, and auto-saving, allowing you to track progress and compete with others online.

4 difficulty levels3 input modesPencil marks with auto fill/erase
🎮 Games
(8.4K)
free with in-app purchases
17
Sudoku・
Sudoku・
Sudoku・
by Optime Software LLC
Free

Experience Sudoku in a feudal Japan setting with beautiful graphics and advanced features. This app offers dual keypad entry, smart note-taking, and error checking to enhance your puzzle-solving. With multiple difficulty levels and thousands of puzzles, it caters to all skill levels.

Dual keypad entrySmart notes (auto-notes & manual deletion)Optional error checking
🎮 Games
(11K)
free with in-app purchases
18
Sudoku Deluxe® Social
Sudoku Deluxe® Social
Sudoku Deluxe® Social
Classic Soduko and Great Tools
Free

This app offers a premium Sudoku experience with thousands of puzzles across numerous books. It includes advanced tools, tutorials, and social features like team tournaments and playing with friends. Customize your game with unique themes and enjoy HD graphics.

Thousands of Sudoku puzzlesAdvanced auto-pencil marksBranching tools
🎮 Games
(758)
free with in-app purchases
19
Killer Sudoku by Sudoku.com
Killer Sudoku by Sudoku.com
Killer Sudoku by Sudoku.com
Math crossword & number puzzle
Free

Engage in a challenging math crossword and number puzzle experience. Solve thousands of Killer Sudoku puzzles with enhanced gameplay, daily challenges, and seasonal events. Train your brain and become a sudoku master with helpful hints and notes.

Killer Sudoku puzzlesThousands of levelsDaily challenges
🎮 Games
(216K)
free with in-app purchases
20
Sudoku - online game
Sudoku - online game
Sudoku - online game
Solve sudoku puzzles online
Free

Engage in classic Sudoku puzzles with multiple difficulty levels and a unique online multiplayer mode. Enjoy a clean, paper-like interface with customizable themes and helpful tools like auto-save and error checks. Track your progress with detailed statistics and compete with others globally.

Thousands of Sudoku puzzles4 difficulty levelsOnline multiplayer
🎮 Games
(11)
ad-supported

FAQ about Classic Sudoku Online

What are the best classic sudoku online apps & games for iPhone?
Classic Sudoku Online tops our classic sudoku online apps & games ranking as of July 2026, with a 5.0-star average from 1 App Store ratings, and it's free to download.
Yes — 20 of the top classic sudoku online apps & games we rank are free to download, including Classic Sudoku Online and ⋆Sudoku.
Classic Sudoku Online shows ads and offers in-app purchases, according to its App Store listing as of July 2026.
We track 228+ classic sudoku online apps & games on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
Yes, Classic Sudoku Online is an online game and requires a good connection to the internet to start playing and participate in matches with other players.
In Classic Sudoku Online, you and other players are presented with a picture and must find a way to complete it. The first player to finish wins the match.