# oorio Sudoku — 21,600 puzzles. Learn logic.

> 21,600 puzzles. Learn logic. (iPhone/iPad app by WOOJAE LEE.)

- Source: https://appshunter.io/ios/app/oorio-sudoku/id6823143849 (this page in markdown: same URL + `.md`)
- Developer: [WOOJAE LEE](https://appshunter.io/developer/6780701537)
- Category: Games, Puzzle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.5 · 237 MB
- Languages: American English
- Released: 2026-11-02
- Data updated: 2026-11-05

## What is oorio Sudoku?

Logic before guessing. Go beyond solving a puzzle and understand how you thought.

oorio Sudoku connects 21,600 regular puzzles and 105 logical techniques through play, guides, training and review.

■ 21,600 puzzles across six planets
Each planet contains 3,600 puzzles: 600 at each of six stages, from Observer and Explorer to Analyst, Strategist, Master and Grandmaster. Difficulty grows with the planet, stage and puzzle number. Completion records and your last position are saved by planet and stage.

■ Logic that expands with every planet
P1: 9 techniques—Full House, Naked Single, Hidden Single and foundations.
P2: 12—locked candidates, pointing, claiming, pairs and triples.
P3: 15—X-Wing, Skyscraper, Two-String Kite and line strategies.
P4: 19—XY-Wing, XYZ-Wing, W-Wing and wing combinations.
P5: 25—coloring, chains, loops, AIC and Unique Rectangles.
P6: 25—advanced fish, ALS, forcing chains and nets, and templates.
These counts describe the techniques newly introduced and emphasized on each planet. Every puzzle does not require every technique.

■ Guides and training for 105 techniques
Learn definitions, candidate patterns, elimination reasons and step-by-step examples, then practice on a real board. Find the relevant rows, columns, boxes or cells; identify candidates and patterns; apply the logic; verify the elimination or placement; and solve it yourself.

■ Easy, standard and advanced solutions
A puzzle can have different logical paths. Where verified paths are available, compare step-by-step easy, standard and advanced solutions, their techniques and reasoning order.

■ Skill checks and growth
Check your current level and get suggestions for what to practice next. Follow your progress through accuracy, independent solving, candidate management, hint use and actual play records.

■ Review your reasoning
After completion, revisit key decisions and the solve timeline. See which cells you chose, how you managed candidates and which techniques and reasons you used. Compare other solution paths.

■ Import your own Sudoku with camera or images
Capture a book, newspaper or screen, or import from your photo library. Check and correct recognized digits before playing and saving. Recognition runs on-device; photos are not sent to a server.

■ Tools for play
Manual and automatic candidates; automatic candidate cleanup after number entry; optional immediate error highlighting; step-by-step Coach and hints; resume, replay and saved imported puzzles; multiple languages and progress records.

Discover, explain and practice logic. Start your own reasoning journey.

All puzzles are free. Detailed analysis and easy/standard/advanced paths share one result pass. Free: 7 trials, then 1 new result/day with a rewarded ad. Ad-free: 1/day without ads. Premium: unlimited. Unlocked results can be reopened without another pass.

Optional monthly/yearly subscriptions renew automatically at the price shown in the App Store purchase screen unless canceled at least 24 hours before the period ends. Manage or cancel in Apple Account subscription settings.
Minimal usage data is on by default and can be turned off in Settings. No server automatic backup is provided; file backup/restore is user initiated.

Privacy: https://myoorio.com/ko/sudoku/privacy/
EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Premium Monthly | $2.99 | per month |
| Premium Annual | $24.99 | per year |
| Ad-free Monthly | $1.49 | per month |
| Ad-free Annual | $11.99 | per year |


## Is oorio Sudoku safe?

Not enough ratings yet to assess oorio Sudoku.

## Is oorio Sudoku legit?

oorio Sudoku has limited verification signals. The AppsHunter Legitimacy Score for oorio Sudoku is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 0.8.5 — 2026-11-03

• New app icon and branding.
• Discover healthcare apps and GlucoMove in Apps & Services.
• Stronger iOS non-personalized advertising and privacy controls.
• Improved shared access for detailed analysis and alternative solutions.
• Clearer information about minimal usage data, manual backups and privacy.

### 0.8.1 — 2026-11-02

No release notes.

## More apps by WOOJAE LEE

- [GlucoMove](https://appshunter.io/ios/app/glucomove/id6780701535)
- [oorio Mines](https://appshunter.io/ios/app/oorio-mines/id6804921642)

All apps by WOOJAE LEE: https://appshunter.io/developer/6780701537

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-05.*