Sudoku· vs Zendoku
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Sudoku·
Engage your mind with a classic Sudoku puzzle game. Enjoy a clean interface and multiple difficulty levels. Track your progress and compete with others.
- Daily Challenge
- Multiple difficulty levels
- Note taking
- Hint system
- Highlight incorrect values
- Individual statistics
- Game Center leaderboard
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Pass the time while you challenge your mind with this classic Sudoku game. The clean, simple layout makes it easy to play for hours at a time. The objective is simple, fill the 9×9 grid with digits so that each column, row, and the nine 3×3 sub-grids contains all of the digits from 1 to 9. Sudoku· features: - Daily Challenge - Four levels (easy, medium, hard, and expert) - Disable numbers once all 9 instances are entered - Note taking ability - Hint (fill in missing number when you are stuck) - Highlight Incorrect Values - Auto Reveal all potential notes - Individual statistics - Game Center with Leaderboard and Achievements Download today for mind-challenging fun.
Zendoku
A clean and elegant sudoku game offering unlimited puzzles across four difficulty levels. Enjoy a distraction-free experience with customizable themes and note-taking features. Play offline with no subscriptions or in-app purchases.
- Unlimited puzzles
- Four difficulty settings
- 32 relaxing themes
- Note-taking feature
- Distraction-free mode
- Offline play
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Simple, clean, elegant sudoku game with unlimited puzzles and a focus on fewer distractions and ease of use. Fully functional without any subscriptions or in-app purchases! - Play puzzles from four difficulty settings from "Easy" to "Unfair" - Choose from 32 beautiful and relaxing built-in themes - Write notes by simply tapping and holding on a number while a cell is selected - Turn off the timer and status bar for relaxed and distraction-free puzzle solving
Screenshots
Verdict
The clearest difference is price: Sudoku· at Free against Zendoku's $0.99. Sudoku· also leads on rating (4.7 vs 4.0) and review sentiment (66% vs 33%). Zendoku's advantage is ads (none vs shown). On update cadence, 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
Sudoku· is free to download; Zendoku costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Sudoku· holds the better App Store score, 4.7 against 4.0. That said, the two scores are not equally well evidenced: Sudoku· has 17K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 66% of Sudoku·'s written reviews are positive against 33% of Zendoku's.
Sudoku· ships an update every 2 months, Zendoku every 3 months. The most recent releases landed on November 6, 2026 and November 1, 2026 respectively.
| Parameter | Sudoku· | Zendoku |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.7 (17K ratings) — better | 4.0 (2 ratings) |
| Positive reviews | 65.7% of reviews — better | 33.3% of reviews |
| Number of ratings | 17K — better | 2 |
| Update frequency | Every 2 months — better | Every 3 months |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 13 — better | 16.1 |
| Further details — not scored | ||
| Size | 42 MB | 61 MB |
| Age rating | 4+ | 4+ |
| Developer | Tim O's Studios, LLC | Harmonic Projects LLC |
Customer experience
Sudoku·
Zendoku
Bugs and requests
Sudoku·
Reported bugs
4 issues- Game freezes or crashes after updates
- Timer issues due to ads
- Difficulty closing ads or navigating UI
- Incompatibility with newer devices
Requested features
4 requests- Option to pay for ad-free version
- Ability to pause and restart games
- More detailed performance tracking
- Customizable color themes
Zendoku
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Sudoku·
No in-app purchases
Zendoku
No in-app purchases
