Comparison

Decrypto vs Sudoku Zen

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

Head to head
About

Decrypto

Engage in a captivating puzzle game where you decode classic ciphers and solve cryptogram word puzzles. This app offers a challenging yet accessible experience for those who enjoy riddles and code-breaking. It's designed for curious minds to train their brains with pure, ad-free fun.

Highlights
  • Decode classic ciphers
  • Solve cryptogram word puzzles
  • Break challenging codes
  • Brain training
  • VoiceOver support
  • Ad-free gameplay
Features
Read full description

Decode classic ciphers, solve cryptogram word puzzles, break challenging codes, and train your brain in Decrypto, the puzzle game for the curious mind. If you love riddles, crosswords, or old-school cypher code-breaking, Decrypto will put your mind to the test. Decrypto is designed to be accessible, with full support for VoiceOver so more players can experience the thrill of codebreaking without barriers. Play for free with no ads, just pure puzzles and brain-teasing fun.

About

Sudoku Zen

Engage in daily logic practice with a clean and calming Sudoku puzzle game. Train your brain, relax, and sharpen number skills with adjustable difficulty levels and helpful tools.

Highlights
  • Classic 9x9 Sudoku puzzles
  • Multiple difficulty levels
  • Calm, minimal board design
  • Notes mode for candidate numbers
  • Smart hints and undo controls
  • Progress tracking and history
Features
Read full description

Find your focus with Sudoku Zen, a clean and calming Sudoku puzzle game built for everyday logic practice. Play classic 9x9 Sudoku at your own pace, choose the right difficulty for your mood, and enjoy a quiet interface that keeps the board clear and the thinking uninterrupted. Whether you want a gentle warm-up or a deeper challenge, Sudoku Zen gives you a simple way to train your brain, relax, and sharpen your number skills. Choose from Easy, Medium, Hard, and Expert puzzles. Use notes to work through possibilities, undo moves when you need to rethink a step, and get a smart hint when you are stuck. Correct moves are rewarded with score and combo progress, while mistakes are tracked with limited lives to keep each puzzle engaging. Sudoku Zen also helps you build a steady practice habit. Resume an unfinished puzzle, review your completed games, track your best times, and follow your score history by difficulty. Features: - Classic 9x9 Sudoku puzzles - Easy, Medium, Hard, and Expert difficulty levels - Calm, minimal board design for focused play - Notes mode for candidate numbers - Smart hints when you need help - Undo and delete controls - Score, timer, and lives - Resume your current puzzle - Progress dashboard with completed games, best times, and best scores Sudoku Zen is made for players who enjoy classic number puzzles, brain training, and peaceful daily logic games. Start a puzzle, slow down, and solve one clean step at a time.

Screenshots

Decrypto4 screens
Sudoku Zen4 screens

Verdict

The call

The clearest difference is in-app purchases: Sudoku Zen at none against Decrypto's 8. Sudoku Zen also leads on rating (5.0 vs 4.8) and review sentiment (100% vs 85%). Decrypto's advantage is ads (none vs shown) and ratings volume (124 vs 1). 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. Decrypto sells 8 one-off in-app purchases. Sudoku Zen asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Sudoku Zen holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Decrypto has 124 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 85% of Decrypto's written reviews are positive against 100% of Sudoku Zen's.

UpkeepUpdate frequency

Decrypto ships an update every 4 days, Sudoku Zen weekly. The most recent releases landed on October 26, 2026 and September 20, 2026 respectively.

Scorecard6 real differences · 4 level
Decrypto versus Sudoku Zen: the parameters behind the verdict, then further details
ParameterDecryptoSudoku Zen
PriceFreeFree
Rating4.8 (124 ratings)5.0 (1 ratings) — better
Positive reviews85.4% of reviews100.0% of reviews — better
Number of ratings124 — better1
Update frequencyEvery 4 days — betterWeekly
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPad — betteriPhone
Requires iOS17.216.4 — better
Further details — not scored
Size17 MB73 MB
Age rating4+4+
DeveloperIncognitum, MBAleksei Popov

Customer experience

Decrypto

All ratings123 ratings
Positive94.3%
Neutral4.1%
Negative1.6%
Written reviews41 reviews
Positive85.4%
Neutral12.2%
Negative2.4%

Sudoku Zen

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

8 purchases

Decrypto

One-time8
  • Help Points$0.99
  • 5 Keys$1.49
  • Remove ads$1.99
Show 5 more
  • 15 Keys$3.49
  • 30 Keys$5.49
  • Unlimited Keys$11.49
  • Solutions$14.99
  • Solutions & Unlimited Keys$19.99
None

Sudoku Zen

No in-app purchases

Questions

Is Decrypto free?
Decrypto is free to download, with in-app purchases available.
Is Sudoku Zen free?
Sudoku Zen is free to download, with no in-app purchases.
Which has better reviews, Decrypto or Sudoku Zen?
Sudoku Zen is rated higher. Decrypto averages 4.8 out of 5 from 124 ratings, while Sudoku Zen averages 5.0 from 1 ratings.
Do Decrypto or Sudoku Zen have ads?
Sudoku Zen shows ads; Decrypto does not.
Which is updated more often, Decrypto or Sudoku Zen?
Decrypto ships an update every 4 days, and Sudoku Zen weekly. Most recently, Decrypto was updated on October 26, 2026 and Sudoku Zen on September 20, 2026.

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