Sudoku· vs Curtle
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.
Curtle
A daily word-guessing game with a horror theme. Solve a new 6-letter puzzle each day using color-coded clues to identify correct letters and their positions. Track your progress, maintain your streak, and share your achievements with friends.
- Daily 6-letter word puzzles
- Color-coded clue system
- Stats tracking and win streaks
- Shareable results
- Daily reminder notifications
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Curtle is a daily word-guessing game, wrapped in a dark horror theme. Each day brings a new 6-letter puzzle. Guess the word in 6 tries using color-coded clues: Green = correct letter, correct position Yellow = correct letter, wrong position Gray = letter not in the word Track your stats, maintain your streak, and share your results with friends. Features: • A new puzzle every day • Stats tracking with win streaks • Share your results with friends • Daily reminder notifications
Screenshots
Verdict
The clearest difference is ads: Curtle at none against Sudoku·'s shown. Curtle also leads on update cadence (daily vs every 2 months) and monetization model (free vs ad-supported). Sudoku·'s advantage is ratings volume (17K vs 2) and rating (4.7 vs 4.5). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Sudoku· holds the better App Store score, 4.7 against 4.5. 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.
Sudoku· ships an update every 2 months, Curtle daily. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.
| Parameter | Sudoku· | Curtle |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (17K ratings) — better | 4.5 (2 ratings) |
| Positive reviews | 65.7% of reviews | — |
| Number of ratings | 17K — better | 2 |
| Update frequency | Every 2 months | Daily — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13 — better | 17.6 |
| Further details — not scored | ||
| Size | 42 MB | 24 MB |
| Age rating | 4+ | 9+ |
| Developer | Tim O's Studios, LLC | Daniel Albu |
Customer experience
Sudoku·
Curtle
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
Curtle
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Sudoku·
No in-app purchases
Curtle
No in-app purchases
