# Sudoku Zen - Number Puzzle — Brain Training Logic Challenge

> Classic Sudoku puzzle game with multiple difficulty levels and brain training features. (iPhone/iPad app by iThinkdiff.)

- Source: https://appshunter.io/ios/app/sudoku-zen-number-puzzle/id565889450 (this page in markdown: same URL + `.md`)
- Developer: [iThinkdiff](https://appshunter.io/developer/377715733)
- Category: Games, Education, Puzzle, Trivia
- Price: Free with in-app purchases
- Rating: 4.80/5 from 16 App Store ratings · 21 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.6 · 39 MB
- Languages: American English
- Released: 2012-10-23
- Data updated: 2026-08-17
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/sudoku-zen-number-puzzle/id565889450/reviews.md

## What is Sudoku Zen?

Train your brain with the classic number puzzle loved by millions worldwide.

Whether you're a complete beginner or a seasoned Sudoku master, this clean and intuitive app delivers the perfect challenge at every level.

FEATURES
- Multiple difficulty levels — Easy, Medium, Hard, and Expert
- Daily Sudoku challenges to keep your streak going
- Instant error detection — no wrong moves slip through
- Complete stats: best time, highest score, longest winning streak
- Beautiful background music for focus and calm
- Game Center leaderboards & achievements

HOW TO PLAY
Fill a 9×9 grid so every row, column, and 3×3 box contains the digits 1–9. Simple rules, deep strategy.

Unlike paper puzzles, you'll never need to erase a mistake. The app catches errors in real time, so you can focus on the logic — not the eraser.

Perfect for daily brain exercise, commutes, or winding down before bed.

## Key features

- Multiple difficulty levels
- Daily Sudoku challenges
- Instant error detection
- Complete game statistics
- Calming background music
- Game Center leaderboards

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Advertise | $0.99 | one-time |


## Recent user reviews (10 of 21)

All indexed reviews: https://appshunter.io/ios/app/sudoku-zen-number-puzzle/id565889450/reviews.md

### 5/5 — Great game

*2023-12-02*

I’ve been playing Sudoku for years now, and this version for at least Seven. The clock running can be a big motivator, or just a secondary concern, but shooting for a low time is what really appeals to me. I still play at least one game almost every day. Just get it.

### 5/5 — Simple, clean & fun

*2016-10-09*

Hard to ask for more... Yet this program delivers more. Just check it out for yourself.

### 1/5 — Ads make unplayable

*2015-04-01, version 2.0.1*

I was really enjoying this game but now the adverts constantly at the bottom of the screen make it impossible to see the numbers and therefore impossible to play!
Very disappointing! :(

### 1/5 — Id off takeover has made app worse

*2015-03-09*

It now takes 18 seconds to get to the game vs just a few before the switchover making it impossible to beat old records. Definitely less fun than previous.

### 5/5 — Che belle gamman.

*2014-03-28*

What is there not to like about this game.  I love it.
My only complaint, my 
fingers are a tad too fat for
the set and screen on my
4s.  Not a problem of the 
charming creation of your
game.  Forgive my possibly/probably grammatically incorrect
Italian.  Upon hearing "Jan
Peerce" sing at rehearsal 
for a Met production of
Verdi's "La Traviata," the
conductor, Arturo Toscanini was reported to
say, "Che Bella voce!"
My attempt at being clever
fell short, exposing me as
a linguistic fraud.  Your
game, however, fulfilled its
every potential.  5*'s and
well done, to the team.

### 2/5 — Needs sorting

*2014-03-26, version 1.3*

It's ok generally. However when you get down to the last few cells, the options are the same. Rather than trying to work it out, you have to guess, so it's a 50:50 and this has an impact on the scores

### 4/5 — Sudoku Pro

*2013-07-08*

Great game, but too often leaves you with multiple solutions of which the game allows only one. You have to guess which one the game considers "correct".

### 5/5 — Fun game!

*2013-05-13*

Lots if fun !

### 4/5 — Emperor Tito

*2013-02-10*

Great fun

### 5/5 — Soukous pro

*2012-12-29*

Great game.

## Frequently asked questions about Sudoku Zen

### What are the difficulty levels in Sudoku Zen?

Sudoku Zen offers multiple difficulty levels to suit all players, including Easy, Medium, Hard, and Expert. This allows beginners to learn and masters to find a suitable challenge.

### Can I play Sudoku Zen offline?

The provided description does not explicitly state whether Sudoku Zen can be played offline. However, many puzzle games offer offline functionality for core gameplay.

### How does Sudoku Zen detect errors?

Sudoku Zen features instant error detection, meaning it will alert you to incorrect moves in real-time. This allows you to focus on the logic without needing to erase mistakes.

### What kind of statistics does Sudoku Zen provide?

The app tracks your performance with complete statistics, including your best time, highest score, and longest winning streak. This helps you monitor your improvement over time.

### Is Sudoku Zen suitable for children?

Sudoku Zen has an age rating of 4+, making it suitable for children. The game's logic-based gameplay can also be beneficial for cognitive development.

### How often is Sudoku Zen updated?

The latest version of Sudoku Zen is 6.0.1, and it was last updated on March 24, 2026. This indicates a recent update, suggesting ongoing support and potential for new features.

### What devices support Sudoku Zen?

Sudoku Zen is available on iPhone and iPad devices. This ensures a consistent experience across Apple's mobile and tablet platforms.

### Does Sudoku Zen have in-app purchases or ads?

Yes, Sudoku Zen is free to download and play but includes both ads and in-app purchases. This allows for monetization while keeping the core game accessible.

## Version history (last 5 releases)

### 6.1.0 — 2026-04-07

- Added support for Light and Dark Mode on both iPhone and iPad
- Kept the original appearance in Light Mode
- Improved game board visibility in Dark Mode
- Fixed an issue where music could start on launch even when turned off in Settings

### 6.0.1 — 2026-03-24

- New refreshed design and improved UI
  - Added Hint system
  - Improved Sudoku generation algorithm
  - Better puzzle reliability and gameplay fixes
  - iPhone and iPad layout improvements
  - Bug fixes and performance improvements

### 6.0.0 — 2026-03-15

- New refreshed design and improved UI
  - Added Hint system
  - Improved Sudoku generation algorithm
  - Better puzzle reliability and gameplay fixes
  - iPhone and iPad layout improvements
  - Bug fixes and performance improvements

### 5.1 — 2017-05-23

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

- some minor bug fixed

### 5.0 — 2016-06-17

- Bug fixed and usability updated

## Apps similar to Sudoku Zen

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Sudoku - Number Puzzle Game](https://appshunter.io/ios/app/sudoku-number-puzzle-game/id556872683) | 4.3 (16) | Free | Games |
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| [Sudoku ...](https://appshunter.io/ios/app/sudoku/id1402458339) | 4.5 (146) | Free | Games |
| [Sudoku Fever - Logic Games](https://appshunter.io/ios/app/sudoku-fever-logic-games/id1247362774) | 4.5 (250) | Free | Games |
| [Sudoku - Number Brain Games](https://appshunter.io/ios/app/sudoku-number-brain-games/id6476258144) | 4.7 (13,906) | Free | Games |
| [Sudoku·](https://appshunter.io/ios/app/sudoku/id839681682) | 4.7 (17,290) | Free | Games |

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All apps by iThinkdiff: https://appshunter.io/developer/377715733

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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 2026-08-17.*