# Classic Sudoku - 9x9 Puzzles — Best online logic challenges

> Free 9x9 Sudoku puzzles with adjustable difficulty and helpful tools. (iPhone/iPad app by HUUUGE GLOBAL LIMITED.)

- Source: https://appshunter.io/ios/app/classic-sudoku-9x9-puzzles/id1472145189 (this page in markdown: same URL + `.md`)
- Developer: [HUUUGE GLOBAL LIMITED](https://appshunter.io/developer/1222929957)
- Category: Games, Board
- Price: Free
- Rating: 4.65/5 from 238 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 11.0 · 196 MB
- Languages: English
- Released: 2019-08-14
- Data updated: 2026-06-10
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/classic-sudoku-9x9-puzzles/id1472145189/reviews.md

## What is Classic Sudoku?

"Looking to relax? Or do you want to give your brain a much needed logical workout? Whatever the case Sudoku is for you!  Don’t have a pen? Don’t have any physical Sudokus? Now you can play Sudoku FREE anywhere you’d like.

Choose from 5 levels of difficulty, ranging from ones that feel like a quick walk in the park all the way to difficult mental marathons that will give your brain a real run for its money. With hints, note taking, auto checking and duplicate highlighting, you can either complete the challenge without any help, as you would with a pencil and a piece of paper, or use all the help you’d like."

## Key features

- 5 difficulty levels
- Hint system
- Note taking
- Auto checking
- Duplicate highlighting
- Play anywhere

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/classic-sudoku-9x9-puzzles/id1472145189/reviews.md

### 5/5 — Me encanta😍😍

*2020-01-22*

Me encanta, mantiene mi mente activa

### 4/5 — No review

*2020-01-18*

No

## Frequently asked questions about Classic Sudoku

### What is Classic Sudoku - 9x9 Puzzles?

This app offers classic 9x9 Sudoku puzzles for players to enjoy on their mobile devices. It provides a digital way to play Sudoku, whether you're looking for a relaxing pastime or a challenging mental exercise.

### What are the key features of this Sudoku app?

The app includes five distinct difficulty levels, from easy to challenging. It also provides helpful tools such as a hint system, note-taking functionality, auto-checking for errors, and duplicate highlighting to assist players.

### Is Classic Sudoku - 9x9 Puzzles free to play?

Yes, the app is free to play. It is supported by advertisements, meaning you can enjoy all the puzzles and features without any upfront cost.

### Who is this app designed for?

This app is ideal for anyone who enjoys logic puzzles and wants to engage their brain. It caters to both casual players looking for a relaxing game and those seeking a more demanding mental challenge.

## Version history (last 5 releases)

### 1.4.1 — 2022-01-24

Minor bugfixes

### 1.3.2 — 2021-10-08

- minor bug fixes

### 1.3.1 — 2021-06-16

- minor bug fixes

### 1.3.0 — 2020-12-23

- minor bug fixes

### 1.2.117 — 2020-10-30

- minor bugfixes

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All apps by HUUUGE GLOBAL LIMITED: https://appshunter.io/developer/1222929957

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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 2026-06-10.*