Comparison

Samurai Sudoku vs Flex Sudoku

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

Head to head
About

Samurai Sudoku

Experience a unique Sudoku challenge with five interconnected grids. Apply standard Sudoku rules to each 9x9 grid, filling numbers to ensure each row, column, and region has one of each digit. Offers multiple difficulty levels and puzzle variations.

Highlights
  • Five overlapping Sudoku grids
  • Five difficulty levels
  • Various Sudoku types (Gattai, Butterfly)
  • Hint feature with conflict checking
  • Highlight same numbers
  • Autosave progress
  • Record best completion times
Features
Read full description

Samurai Sudoku puzzle contains five overlapping sudoku grids. The basic sudoku rules apply to each 9 x 9 grid. Basic Rule: Fill numbers in the board such that every row, column and region contains one occurrence of each number. **** Samurai Sudoku features **** # Content - 5 difficulty levels - Various types of Sudokus, including Gattai (3 overlapping sudoku grids), Butterfly (4 overlapping sudoku grids), etc. # Features - "Hint" auto fills the board with memo that has no direct conflicts with other numbers - Highlight same numbers as you select a number on board - Autosave the process of unfinished levels - Record best completion time for each level # Challenge - Game Center Achievements - Try to complete as many levels as possible If you have encountered any problem, please send an email to brightskygames@me.com

About

Flex Sudoku

Engage with challenging Sudoku puzzles of various sizes, from classic 9x9 to larger 16x16 and 25x25 grids. Load pre-made games, create your own, and utilize a built-in solver and note-taking features to enhance your solving experience.

Highlights
  • Multiple Sudoku grid sizes (4x4 to 25x25)
  • Load thousands of built-in games
  • Enter and solve your own games
  • Adjustable difficulty levels
  • Built-in Sudoku solver
  • Note-taking and hint system
  • Track game statistics
Features
Read full description

Challenge yourself by playing more complex version of sudoku. You can try the classic 9x9, or more complex 16x16 or 25x25. You can even try 4x4 version for fun. Here is what you can do with the game: 1. Play classic, 16x16, 25x25 or 4x4 size sudoku game. 2. Play by loading thousands of built in games or enter your own game. 3. Choose the degree of difficulty of these games. 4. A sudoku solver is built in and can be used for solving any game you are playing. 5. Enter Notes while solving the game or using mutliple levels of hints to help you with the game. 6. Keep track of number of games played, minimum, maximum and average time to complete the game.

Screenshots

Samurai Sudoku4 screens
Flex Sudoku4 screens

Verdict

The call

The clearest difference is rating: Samurai Sudoku at 4.6 against Flex Sudoku's 3.1. Samurai Sudoku also leads on review sentiment (75% vs 50%) and ratings volume (383 vs 8). Flex Sudoku's advantage is in-app purchases (none vs 10) and ads (none vs shown). On price, update cadence, device support and iOS requirement 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. Samurai Sudoku sells 10 one-off in-app purchases. Flex Sudoku asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Samurai Sudoku holds the better App Store score, 4.6 against 3.1. That said, the two scores are not equally well evidenced: Samurai Sudoku has 383 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 75% of Samurai Sudoku's written reviews are positive against 50% of Flex Sudoku's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

Scorecard6 real differences · 4 level
Samurai Sudoku versus Flex Sudoku: the parameters behind the verdict, then further details
ParameterSamurai SudokuFlex Sudoku
PriceFreeFree
Rating4.6 (383 ratings) — better3.1 (8 ratings)
Positive reviews75.0% of reviews — better50.0% of reviews
Number of ratings383 — better8
Update frequencyEvery 2 monthsEvery 2 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.4
Further details — not scored
Size23 MB4 MB
Age rating4+4+
DeveloperStanley LamJatinder Gogna

Customer experience

Samurai Sudoku

All ratings366 ratings
Positive91.8%
Neutral4.1%
Negative4.1%
Written reviews116 reviews
Positive75.0%
Neutral8.6%
Negative16.4%

Flex Sudoku

All ratings7 ratings
Positive57.1%
Neutral0.0%
Negative42.9%
Written reviews6 reviews
Positive50.0%
Neutral16.7%
Negative33.3%

Bugs and requests

Samurai Sudoku

Reported bugs

10 issues
  • App crashes when watching required videos
  • Weekly puzzle videos fail to load
  • Game freezes mid-puzzle with no progress saved
  • Purchased puzzles disappear after app updates or reinstalls
  • Ad screens block gameplay with no visible close button
Show 5 more
  • Unresponsive number input requiring multiple taps
  • App locks up permanently in certain situations
  • Video orientation mismatch on horizontal device orientation
  • Occasional glitches requiring app restart
  • Multiple solutions recognized as single correct answer

Requested features

10 requests
  • Auto-fill feature for candidate notes/pencil marks
  • Pause button for games in progress
  • Left-handed mode option
  • Highlight vertical and horizontal lines for easier solving
  • Ability to create and submit custom puzzles
Show 5 more
  • Larger puzzle sizes and more complex variations
  • Clue system that provides one hint at a time
  • Screen lock to prevent auto-dimming during gameplay
  • Bundled subscription option instead of individual pack purchases
  • Auto-generate puzzles instead of hard-coded content

Flex Sudoku

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

Samurai Sudoku

One-time10
  • Diagonal Samurai Pack$1.99
  • Samurai Beginner Pack$1.99
  • Samurai Median Pack$1.99
Show 7 more
  • Samurai Advanced Pack$1.99
  • Samurai Expert Pack$1.99
  • Samurai Advanced Pack 2$1.99
  • Samurai Basic Pack$1.99
  • Jigsaw Samurai Pack$2.99
  • Anti Diagonal Samurai Pack$2.99
  • Samurai Sudoku$3.99
None

Flex Sudoku

No in-app purchases

Questions

Is Samurai Sudoku free?
Samurai Sudoku is free to download, with in-app purchases available.
Is Flex Sudoku free?
Flex Sudoku is free to download, with no in-app purchases.
Which has better reviews, Samurai Sudoku or Flex Sudoku?
Samurai Sudoku is rated higher. Samurai Sudoku averages 4.6 out of 5 from 383 ratings, while Flex Sudoku averages 3.1 from 8 ratings.
Do Samurai Sudoku or Flex Sudoku have ads?
Samurai Sudoku shows ads; Flex Sudoku does not.
Which is updated more often, Samurai Sudoku or Flex Sudoku?
Samurai Sudoku ships an update every 2 months, and Flex Sudoku every 2 months. Most recently, Samurai Sudoku was updated on November 1, 2026 and Flex Sudoku on November 3, 2026.

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