# Sudoku Book - Number Puzzle — Sudoku Puzzle: Brain Number :)

> Free classic Sudoku number puzzle game with thousands of levels and helpful tools. (iPhone/iPad app by 建刚 范.)

- Source: https://appshunter.io/ios/app/sudoku-book-number-puzzle/id1547164179 (this page in markdown: same URL + `.md`)
- Developer: [建刚 范](https://appshunter.io/developer/1356061721)
- Category: Games, Board, Puzzle
- Price: Free with in-app purchases
- Rating: 5.00/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 9.0 · 108 MB
- Languages: English
- Released: 2021-01-04
- Data updated: 2026-08-08
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/sudoku-book-number-puzzle/id1547164179/reviews.md

## What is Sudoku Book?

Brand New Free Sudoku Puzzle Game

Keep your brain sharp with the brand new Free Sudoku Puzzle Game. Thousands of Sudoku Puzzles Game to play and solve for FREE! A classic brain number puzzle games: Sudoku with beautifully refined user interface. Try new levels You've never seen before!

Basic Sudoku Rules:
The grid is divided into nine blocks, each containing nine squares. The rules of the game are simple: each of the nine blocks has to contain all the numbers 1-9 within its squares. Each number can only appear once in a row, column or box.

Features:
- 4800 puzzles in four different difficulties (Gentle, Medium, Hard, Evil).
- Choose a variety of skins, and there is a night mode, which protects your eyes at night.
- User-friendly interface: Focus on solving sudoku problems. Try it and experience the charm of numbers!
- Hints: Give you the best clues to solve the puzzle.
- Undo: Undo helps the Sudoku problems be traced back to its previous state.
- Note Mode: Turn on the note mode to take notes like a piece of paper. 
- Statistics: You can check your records at a glance.

Best Sudoku games, classic Sudoku games. Play Sudoku Free! Solving Sudoku free puzzles requires $0! Free to download, free to play, no WiFi games! Train your brain anytime and anywhere with the Sudoku Book. Challenge yourself how quickly you can solve problems! Awesome graphics, supreme simplicity, animated highlight... all for your brand-new experience in the classic Sudoku Brain games.

(Tip: "Sudoku" is a Japanese word, which means "single number". However, it was originated in Switzerland and then got popular in Japan and then America. It is often misspelled as soduko, soduku, sodoku, suduko, sudoko, etc.)

Enjoyword sudoku and number games? This is your final destination! The best sudoku app for sodoku fans!

## Key features

- Thousands of Sudoku puzzles
- Four difficulty levels
- Night mode
- Hint system
- Undo functionality
- Note-taking mode
- Statistics tracking

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |
| 100 Hints | $19.99 | one-time |
| 500 Hints | $49.99 | one-time |
| 25 Hints | $4.99 | one-time |
| 1000 Hints | $79.99 | one-time |
| 3000 Hints | $99.99 | one-time |



## Frequently asked questions about Sudoku Book

### How many puzzles are available in Sudoku Book?

Sudoku Book offers 4800 puzzles across four difficulty levels: Gentle, Medium, Hard, and Evil. This provides a vast amount of content for players to enjoy.

### Can I play Sudoku Book offline?

Yes, Sudoku Book is a free game that does not require WiFi to play. You can train your brain anytime and anywhere with its offline capabilities.

### Does Sudoku Book have ads?

Yes, Sudoku Book contains advertisements. As a free game with in-app purchases, ads are part of its monetization model.

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

Sudoku Book features four distinct difficulty levels: Gentle, Medium, Hard, and Evil. This allows players of all skill levels to find a suitable challenge.

### Does Sudoku Book have a night mode?

Yes, Sudoku Book includes a night mode designed to protect your eyes. This feature is beneficial for playing the game during nighttime or in low-light conditions.

### What helpful tools does Sudoku Book offer?

Sudoku Book provides several helpful tools to assist players, including a hint system for clues, an undo function to backtrack mistakes, and a note mode for jotting down possibilities.

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

Sudoku Book has an age rating of 4+. This indicates it is suitable for a wide range of players, including children and adults.

### How often is Sudoku Book updated?

Sudoku Book was last updated on January 5, 2021, with version 1.0.2. Further update frequency information is not available in the provided data.

## Version history (last 1 release)

### 1.0.2 — 2021-01-05

No release notes.

## Apps similar to Sudoku Book

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [3Q Sudoku](https://appshunter.io/ios/app/3q-sudoku/id6503253256) | — | Free | Games |
| [CardsMatch 3D](https://appshunter.io/ios/app/cardsmatch-3d/id6499559103) | 1.0 (1) | Free | Games |
| [SudokuU](https://appshunter.io/ios/app/sudokuu/id1195710531) | — | Free | Games |
| [Snakes & Ladders Now](https://appshunter.io/ios/app/snakes-and-ladders-now/id6757461165) | — | Free | Games |
| [Sudoku - The Daily Sudoku](https://appshunter.io/ios/app/sudoku-the-daily-sudoku/id1075135036) | 5.0 (2) | Free | Games |
| [Sudoku Note](https://appshunter.io/ios/app/sudoku-note/id6757120330) | 3.5 (2) | Free | Games |

## More apps by 建刚 范

- [WordFab - Crossword Puzzles!](https://appshunter.io/ios/app/wordfab-crossword-puzzles/id1387132780)
- [Pixel Color Paint by Number](https://appshunter.io/ios/app/pixel-color-paint-by-number/id1401148627)
- [Sudoku: Classic Puzzle Game](https://appshunter.io/ios/app/sudoku-classic-puzzle-game/id1401386576)
- [One touch drawing: IQ Test](https://appshunter.io/ios/app/one-touch-drawing-iq-test/id1403251654)
- [WordYoga: Word Game Collection](https://appshunter.io/ios/app/wordyoga-word-game-collection/id1450130990)
- [Word World: Crossword Puzzles](https://appshunter.io/ios/app/word-world-crossword-puzzles/id1487906989)

All apps by 建刚 范: https://appshunter.io/developer/1356061721

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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 2026-08-08.*