Comparison

Sudoku ▦ vs Challenge! Sudoku

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Sudoku ▦

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.

Highlights
  • Thousands of free puzzles
  • Classic Sudoku design
  • Pencil mode for notes
  • Highlight duplicates
  • Optional mistake limit
  • Four difficulty levels
  • Customizable appearance
Features
Read full description

Sudoku ▦ is one of the best loved and most popular puzzle games in the world. Now you can play the classic paper and pencil puzzle game right on your phone! With our simple and elegant design, Tripledot’s Sudoku▦ for mobile is the best way to play this timeless classic. Challenge your problem-solving skills with an expert-level game or take a break with a quick game on easy mode. Whether you’re a hyper competitive puzzle solver or just looking for a way to relax, a beginner or a master puzzler, Tripledot’s Sudoku ▦ will let you play the game your way. Choose from four different difficulty levels, and customise your experience with features to help or challenge you. Key Features: - Thousands of well-formed, totally free puzzles - The classic Sudoku design, beautifully recreated on your phone - Use the pencil to make notes right on the puzzle - Highlight duplicates to help you solve the puzzle - Challenge yourself by limiting yourself to three mistakes - Use hints to help you find your way through difficult puzzles - - Play Sudoku your way with our finely tuned customisation - Four perfectly crafted difficulty levels: Easy, Medium, Hard, and Expert. - Highlight duplicates to avoid repeating numbers in a row, column, and block - Automatically Check for Mistakes: Enable auto-check to easily spot your mistakes, or disable it to play a more free-form game - Optional Mistake Limit: challenge yourself to play a perfect game, or relax with unlimited mistakes - Pencil mode: Use the pencil mode to make notes on each cell, which automatically update as you play the game - Statistics: See your best times and streaks for every difficulty level - Autosave: Your puzzles save as you go, so you can come back anytime - Hints: Hints can guide you through the puzzle when you are stuck - Eraser: Made a mistake? Get rid of it by using the eraser feature - Unlimited undo's: Eliminate errors using our unlimited undo feature - Customize appearance: Choose from six different beautiful skins for a game that is as easy on the eyes as it is to play By using Sudoku ▦, you agree to our Terms of Use and Community Guidelines available at https://www.tripledotstudios.com/tos Questions? Email Sudoku_support@tripledotstudios.com for help!

About

Challenge! Sudoku

Engage in classic Sudoku puzzles with a competitive edge. Challenge players globally and locally to achieve top rankings on leaderboards. Customize difficulty levels to suit your skill, from beginner to expert.

Highlights
  • Global ranking system
  • Compete with friends
  • Multiple difficulty levels
  • User-friendly interface
  • Record sharing
Features
Read full description

* Introduction Our Sudoku app offers a simple yet addictive classic puzzle. Compete with other users and aim for the top position on the Sudoku rankings. * Key Features Ranking System: Share Sudoku records with players worldwide and compete on the rankings. Various Difficulty Levels: Suitable for beginners to experts, with customizable difficulty settings. Compete with Friends: Share Sudoku records with friends and compete together. User-Friendly Interface: Enjoy playing Sudoku with an intuitive and easy-to-use interface. * How to Get Started Choose your preferred Sudoku difficulty. Solve Sudoku puzzles and achieve records. Compete with others to rank higher on the leaderboard! Use our Sudoku app to improve your skills and aspire to become the Sudoku champion of the world!

Screenshots

Sudoku ▦4 screens
Challenge! Sudoku4 screens

Verdict

The call

The clearest difference is review sentiment: Challenge! Sudoku at 100% against Sudoku ▦'s 38%. Challenge! Sudoku also leads on ads (none vs shown) and update cadence (every 2 days vs every 2 weeks). Sudoku ▦'s advantage is ratings volume (104K vs 2). On price, in-app purchases and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Challenge! Sudoku holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Sudoku ▦ has 104K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 38% of Sudoku ▦'s written reviews are positive against 100% of Challenge! Sudoku's.

UpkeepUpdate frequency

Sudoku ▦ ships an update every 2 weeks, Challenge! Sudoku every 2 days. The most recent releases landed on November 1, 2026 and October 17, 2026 respectively.

Scorecard7 real differences · 3 level
Sudoku ▦ versus Challenge! Sudoku: the parameters behind the verdict, then further details
ParameterSudoku ▦Challenge! Sudoku
PriceFreeFree
Rating4.7 (104K ratings)5.0 (2 ratings) — better
Positive reviews37.6% of reviews100.0% of reviews — better
Number of ratings104K — better2
Update frequencyEvery 2 weeksEvery 2 days — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.012.0 — better
Further details — not scored
Size249 MB58 MB
Age rating12+4+
DeveloperTripledot Studioskyulabs

Customer experience

Sudoku ▦

All ratings104,192 ratings
Positive92.9%
Neutral4.5%
Negative2.6%
Written reviews417 reviews
Positive37.6%
Neutral13.7%
Negative48.7%

Challenge! Sudoku

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Sudoku ▦

Reported bugs

3 issues
  • Freezing and crashing issues
  • Incorrect number placement detection
  • Daily challenge progress not saving properly

Requested features

4 requests
  • Option to pay to remove ads
  • More customization options
  • Ability to reset puzzles
  • Improved performance on older devices

Challenge! Sudoku

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Sudoku ▦

No in-app purchases

None

Challenge! Sudoku

No in-app purchases

Questions

Is Sudoku ▦ free?
Sudoku ▦ is free to download, with no in-app purchases.
Is Challenge! Sudoku free?
Challenge! Sudoku is free to download, with no in-app purchases.
Which has better reviews, Sudoku ▦ or Challenge! Sudoku?
Challenge! Sudoku is rated higher. Sudoku ▦ averages 4.7 out of 5 from 104K ratings, while Challenge! Sudoku averages 5.0 from 2 ratings.
Do Sudoku ▦ or Challenge! Sudoku have ads?
Sudoku ▦ shows ads; Challenge! Sudoku does not.
Which is updated more often, Sudoku ▦ or Challenge! Sudoku?
Sudoku ▦ ships an update every 2 weeks, and Challenge! Sudoku every 2 days. Most recently, Sudoku ▦ was updated on November 1, 2026 and Challenge! Sudoku on October 17, 2026.

Other comparisons