# Sudoku HD - 9x9 brain-teaser — Classic Number Puzzle Game

> Unlimited Sudoku puzzles with adjustable difficulty and helpful game aids. (iPhone/iPad app by oWorld Software.)

- Source: https://appshunter.io/ios/app/sudoku-hd-9x9-brain-teaser/id469346386 (this page in markdown: same URL + `.md`)
- Developer: [oWorld Software](https://appshunter.io/developer/291192797)
- Category: Games, Entertainment, Family, Puzzle
- Price: Free with in-app purchases
- Rating: 5.00/5 from 4 App Store ratings
- Age rating: 4+
- Requires: iOS 9.0 · 35 MB
- Languages: American English, Arabic, Catalan, Czech, Danish, Dutch, Finnish, French (France), German (Germany), Greek and 21 more
- Released: 2011-10-24
- Data updated: 2026-06-04
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/sudoku-hd-9x9-brain-teaser/id469346386/reviews.md

## What is Sudoku HD?

Play Sudoku for hours thanks to an unlimited number of grids! 3 difficulty levels, a simple an intuitive design ! Face the Sudoku challenge in the metro, at the office, in a waiting room, in the toilet…! 

3 difficulty levels: Easy, Normal, Hard! You’ll finish an Easy grid in 10 min, whereas you could spend all night on an Hard grid. Sudoku for all levels! 

Features: 

• Put down all candidates for a cell (example: the cell can contain 1,4,6,9) 
• Click a number to show all of the numbers of the grid (example: clicking on “1” shows all the other “1s”) 
• You can view clearly which line and which column you clicked on! 
• Access a user’s manual 
•Access to help that will: 
o Check the grid to see if you made a mistake 
o Add a number if you get stuck 
Be careful as using the help feature adds a time penalty to the clock. 

See all the possible candidates for the empty cells in 2 seconds? 
That’s easy: use credit to calculate it automatically. You can purchase additional credit directly within the application: you receive 2 free credits upon first installation. 

There’s nothing unnecessary in this application, just the essential.

## Key features

- Unlimited Sudoku grids
- 3 difficulty levels (Easy, Normal, Hard)
- Candidate highlighting
- Number highlighting
- Grid error checking
- Hints and number assistance
- User manual and help access

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Buy 10 credits | $0.99 | one-time |



## Frequently asked questions about Sudoku HD

### What is Sudoku HD?

Sudoku HD is a classic number puzzle game offering an unlimited supply of Sudoku grids across three difficulty levels: Easy, Normal, and Hard. It features an intuitive design and helpful tools to assist players.

### Does Sudoku HD have ads?

No, Sudoku HD is ad-free, providing an uninterrupted puzzle-solving experience for users.

### What devices does Sudoku HD support?

Sudoku HD is designed for iPad devices, offering a tailored experience for the tablet platform.

### How difficult are the Sudoku puzzles in Sudoku HD?

The app offers three distinct difficulty levels: Easy, Normal, and Hard. Easy grids can be completed in about 10 minutes, while Hard grids can be significantly more challenging.

### Can Sudoku HD help me if I get stuck?

Yes, Sudoku HD includes a help feature that can check your grid for mistakes or add a number if you are stuck. However, using this feature incurs a time penalty.

### Is Sudoku HD suitable for beginners?

Yes, with its Easy difficulty level and helpful features like error checking and hints, Sudoku HD is suitable for beginners learning to play Sudoku.

### How often is Sudoku HD updated?

Sudoku HD was last updated on June 7, 2018, with version 1.0.3. It has not received updates since then.

### What is the age rating for Sudoku HD?

Sudoku HD has an age rating of 4+, making it suitable for a wide range of players.

## Version history (last 4 releases)

### 1.0.3 — 2018-06-07

This app has been updated by Apple to display the Apple Watch app icon.

Fix some UI bugs
Better data privacy settings.

### 1.0.2 — 2016-06-09

- minor updates

### 1.0.1 — 2011-12-18

- Change application name in Japan

### 1.0 — 2011-10-23

No release notes.

## Apps similar to Sudoku HD

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [NumberPlace Infinity](https://appshunter.io/ios/app/numberplace-infinity/id409116907) | 4.8 (4) | Free | Games |
| [Number Place Class](https://appshunter.io/ios/app/number-place-class/id1565306190) | — | Free | Games |
| [Absolute Brain Puzzle](https://appshunter.io/ios/app/absolute-brain-puzzle/id1570103884) | — | Free | Games |
| [one stroke draw - 一筆描きパズルゲーム](https://appshunter.io/ios/app/one-stroke-draw/id1671466064) | — | Free | Games |
| [Math quiz / Calculator quiz](https://appshunter.io/ios/app/math-quiz-calculator-quiz/id6738276121) | — | $0.99 | Games |
| [FlashNumbers：Train your memory](https://appshunter.io/ios/app/flashnumberstrain-your-memory/id1165941421) | 5.0 (1) | Free | Games |

## More apps by oWorld Software

- [Animal sounds - Images](https://appshunter.io/ios/app/animal-sounds-images/id300979900)
- [Firearm simulator : sounds, noises and images, photos FREE](https://appshunter.io/ios/app/firearm-simulator-sounds-noises-and-images-photos-free/id324516043)
- [Quiz animal: Calls of the wild](https://appshunter.io/ios/app/quiz-animal-calls-of-the-wild/id327041190)
- [Don't push the red button: the famous game! You won't be able to stop !](https://appshunter.io/ios/app/dont-push-the-red-button-the-famous-game-you-wont-be-able-to-stop/id330560517)
- [Money converter - Currency](https://appshunter.io/ios/app/money-converter-currency/id380877896)
- [Conversion Calculator !](https://appshunter.io/ios/app/conversion-calculator/id417794697)

All apps by oWorld Software: https://appshunter.io/developer/291192797

---

*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 2026-06-04.*