Decrypto vs Sudoku Zen
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
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.
- Decode classic ciphers
- Solve cryptogram word puzzles
- Break challenging codes
- Brain training
- VoiceOver support
- Ad-free gameplay
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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.
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.
- 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
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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
Verdict
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
Both are free to download. Decrypto sells 8 one-off in-app purchases. Sudoku Zen asks for nothing beyond the download.
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.
Decrypto ships an update every 4 days, Sudoku Zen weekly. The most recent releases landed on October 26, 2026 and September 20, 2026 respectively.
| Parameter | Decrypto | Sudoku Zen |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (124 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 85.4% of reviews | 100.0% of reviews — better |
| Number of ratings | 124 — better | 1 |
| Update frequency | Every 4 days — better | Weekly |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.2 | 16.4 — better |
| Further details — not scored | ||
| Size | 17 MB | 73 MB |
| Age rating | 4+ | 4+ |
| Developer | Incognitum, MB | Aleksei Popov |
Customer experience
Decrypto
Sudoku Zen
In-app purchases
Decrypto
- Help Points$0.99
- 5 Keys$1.49
- Remove ads$1.99
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- 15 Keys$3.49
- 30 Keys$5.49
- Unlimited Keys$11.49
- Solutions$14.99
- Solutions & Unlimited Keys$19.99
Sudoku Zen
No in-app purchases









