Comparison

Sudoku S. vs Merge Stack

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

Head to head
About

Sudoku S.

Engage in logic-based number puzzles with a clean interface and advanced hint system. Compete in daily challenges, earn XP, and climb leaderboards across multiple platforms. Offers various difficulty levels and game modes for continuous learning and fun.

Highlights
  • Advanced hint system with popular Sudoku techniques
  • Clean and clear design for touch screens
  • 10,000 puzzles in 5 difficulty levels
  • Two game modes: random game and daily challenge
  • Daily challenges with global leaderboards
  • Cross-platform play
  • Progress saving and resuming
Features
Read full description

Sudoku is a logic-based number puzzle. The objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 subgrids that compose the grid contains all of the digits from 1 to 9. Each puzzle has only one solution. Play random games to earn xp and train your skills. You earn both xp and trophies in daily challenges. Let's see Who will be the first Sudoku Legend? Features: - Advanced hint system. It teaches you solve sudoku step by step using popular sudoku techniques: Hidden Single, Naked Single, Hidden Pair, Naked Pair, Pointing, Claiming, X wing, Swordfish, etc. - Clean & Clear Design; - New design for touch screen, Easy to edit big/small numbers. No tedious process, no break thoughts; - 10,000 selected puzzles, in 5 levels of difficulty; - 2 game modes: random game and daily challenge; - Everyday 3 challenges. Play with global players & friends. - Earn XP from random games and climb to higher level up to Sudoku Legend; - Earn XP & Trophies from daily challenges. - New Design of Leaderboards, more powerful than game center and look great; - Cross-platform, this is a united sudoku world for all popular mobile platforms; - Your progress is saved and you can resume at any time; Enjoy Sudoku S.! keyword: puzzle, game, app, number place, design, daily, online, sudoku, suduku, suduko, sudoko, soduku, sodoku, soduko, sodoko

About

Merge Stack

Features
Read full description

Slide. Merge. Pop! Merge Stack: Color Block is the satisfying color puzzle that's easy to learn and hard to put down. Swipe to slide the blocks across the board, line up matching colors, and stack five of the same color to make them burst. One clean rule, endless clever moves. Every swipe shifts the whole board, so the fun is in planning ahead. Set up chains, clear crowded columns, and keep your grid open for the next move. Simple to pick up, tricky to master.

Screenshots

Sudoku S.4 screens
Merge Stack4 screens

Verdict

The call

The clearest difference is iOS requirement: Sudoku S. at 11.0 against Merge Stack's 15.0. On price, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

Sudoku S. ships an update every 5 weeks, Merge Stack every 2 months. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

Scorecard1 real difference · 9 level
Sudoku S. versus Merge Stack: the parameters behind the verdict, then further details
ParameterSudoku S.Merge Stack
PriceFreeFree
Rating5.0 (4 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 5 weeks — betterEvery 2 months
AdsYesYes
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better15.0
Further details — not scored
Size105 MB238 MB
Age rating4+4+
Developer果林 欧Kite Games

In-app purchases

None

Sudoku S.

No in-app purchases

None

Merge Stack

No in-app purchases

Questions

Is Sudoku S. free?
Sudoku S. is free to download, with no in-app purchases.
Is Merge Stack free?
Merge Stack is free to download, with no in-app purchases.
Do Sudoku S. or Merge Stack have ads?
Both Sudoku S. and Merge Stack show ads.
Which is updated more often, Sudoku S. or Merge Stack?
Sudoku S. ships an update every 5 weeks, and Merge Stack every 2 months. Most recently, Sudoku S. was updated on November 4, 2026 and Merge Stack on October 31, 2026.

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