# Sudoku — Next Number Puzzle — Brain Training & Exercise

> Classic Sudoku logic puzzle game with time attack and world ranking. (iPhone/iPad app by NEXTBOOK, Inc..)

- Source: https://appshunter.io/ios/app/sudoku-next-number-puzzle/id1400583125 (this page in markdown: same URL + `.md`)
- Developer: [NEXTBOOK, Inc.](https://appshunter.io/developer/395934057)
- Category: Games, Board, Puzzle
- Price: Free with in-app purchases
- Rating: 4.61/5 from 589 App Store ratings · 59 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.0 · 65 MB
- Languages: English, Japanese
- Released: 2018-08-03
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/sudoku-next-number-puzzle/id1400583125/reviews.md

## What is Sudoku?

The classic logic puzzle game, Sudoku with time attack and world ranking features. It helps you with training the brain, serving as recreation and relieves stress. We have not only common 9×9 Sudoku puzzles but also 4×4 and 6×6 Sudoku puzzles. 

Complete Functions!

· 3 sizes of puzzles (4×4, 6×6 and 9×9)
· Different levels (simple, easy, medium, difficult, hardest)
· Time Puzzle 
· Time Competition
· World Ranking
· Duplicates highlight (simple mistake prevention) 
· Pencil function (memo function)
· Eraser function
· Clear all function

· Error searcher 
· Hint suggestion
· Number first input method, which can be easily switched from Cell first method.


Also Great for Sudoku Beginners!
There are smaller sized Sudoku puzzles (4x4, 6x6) prepared for beginners and children, which is a feature that cannot be found in other Sudoku apps. This allows beginners to grasp the technique behind Sudoku quickly to move on to the 9x9 puzzles.

Battle SUDOKU (NEW!!)
Two players, one puzzle. Lock in more squares faster than you opponent.

Daily challenge puzzles make beginners more familiar by questing smiley emoji stamps every day.

Time Attack Mode Available! 
Challenge solving puzzles as fast as you can! Of course, every size of puzzles (4×4, 6×6 and 9×9) are playable for the time attack mode. You can try to break your personal record and challenge your limits. In addition, you can compete with players from around the world by speed.

Ranking Function Available!
This app is also designed to make users feel like a game on top of the contentment of solving the puzzles. A certain number of points are added when each puzzle is solved. The number of points changes according to the level of difficulty. You can challenge the rankings every day as there are different types, such as those that last for a day, a week, a month, and forever.

Others
We promise to make improvements on both regular and irregular basis to make the game more enjoyable. We will read all the reviews carefully and take them into account, so please give us any feedback and improvement points that you would like to see done.

Please try playing Sudoku in the way that can only be done in apps first!

## Key features

- Multiple puzzle sizes (4x4, 6x6, 9x9)
- Various difficulty levels
- Time attack mode
- World ranking system
- Duplicate highlighting
- Pencil and eraser functions
- Battle Sudoku (2-player mode)

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove ADS 180 days | $4.99 | one-time |
| Remove ADS 30 days | $0.99 | one-time |
| Unlimited Item Usage 30 days | $0.99 | one-time |
| Unlimited Item Usage 180 days | $4.99 | one-time |


## What do users think of Sudoku?

Overall sentiment: positive

**Pros**

- 👍 Easy to understand and play
- 🧠 Helps train the brain
- 🕹️ Enjoyable gameplay
- 🎨 Attractive design and graphics
- 🤝 Multiplayer and competitive features

**Cons**

- ⚠️ Lack of warning before retrying a puzzle
- 🔍 Limited options and features

**Commonly reported bugs**

- Incorrect number inputs being marked as wrong
- App not working in offline mode

**Most requested features**

- Ability to check if input is correct
- More difficulty levels and puzzle variations

## Recent user reviews (10 of 59)

All indexed reviews: https://appshunter.io/ios/app/sudoku-next-number-puzzle/id1400583125/reviews.md

### 1/5 — Warning

*2019-10-01*

Provide warning before you try a puzzle for a 2nd time, NOT afterwards.

### 5/5 — Praise worthy

*2019-07-28, version 8.2.0*

Actually, I didn't know Sudoku game before, but this application helps me understand how to play quickly. Many thanks!!!

### 5/5 — An interesting entertainment

*2019-07-28, version 8.2.0*

I'm hapy to play it everyday. I also challenge my friends and we had many great times together.

### 5/5 — That's fab!!!

*2019-07-28, version 8.2.0*

Lucky for me when I found this app on store. I think other players also like this game. Hope that the developers will continue to create many new features

### 5/5 — Give it 3000 stars!!!

*2019-07-28, version 8.2.0*

I have played lots of game like Sudoku but this application is a new thing. I like time puzzle feature in this app

### 5/5 — This is app I need

*2019-07-28, version 8.2.0*

I like games which are helpful for my brain like this application. It is my best game I 've ever played.

### 5/5 — Fantastic!!!

*2019-07-28, version 8.2.0*

You won' stop yourself from playing it. I sure that you will like it.

### 5/5 — Quality application

*2019-07-28, version 8.2.0*

People who made this app are so creative. This is an old game but in a new generation.

### 5/5 — Commendable!!!

*2019-07-28, version 8.2.0*

My girlfriend downloaded it for me and now she don't like it because I spend ~ 3 hours playing this game. I like it!!!

### 5/5 — So enjoyable!!!

*2019-07-27, version 8.2.0*

I like a feature that is suitable for beginers. It cannot be found in other Sudoku apps.

## Frequently asked questions about Sudoku

### What is this app?

This app is a classic Sudoku logic puzzle game designed for brain training and recreation. It offers various puzzle sizes, difficulty levels, and competitive modes like time attack and world rankings. It also includes helpful features for both beginners and experienced players.

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

Key features include multiple puzzle sizes (4x4, 6x6, 9x9), various difficulty levels, a time attack mode, a world ranking system, duplicate highlighting to prevent mistakes, a pencil function for notes, an eraser, an error searcher, and hint suggestions. It also offers a unique Battle Sudoku mode for two players.

### Is this app free to play?

Yes, the application is free to play. It does not mention any in-app purchases or subscription models, indicating a completely free experience for users.

### Who is this app suitable for?

This app is suitable for a wide range of users, including Sudoku beginners who can start with smaller puzzles and helpful tools, as well as experienced players looking for a challenge. It's also great for anyone seeking brain training, stress relief, or a competitive puzzle experience.

### What makes this Sudoku app different from others?

This app stands out by offering smaller puzzle sizes (4x4, 6x6) specifically for beginners and children, which is not common in other Sudoku apps. It also features a competitive 'Battle Sudoku' mode for two players and daily challenges with emoji stamps to encourage engagement.

## Version history (last 1 release)

### 8.2.2 — 2020-04-23

We have optimized the app for the latest OS.

## Apps similar to Sudoku

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Killer Sudoku Challenge](https://appshunter.io/ios/app/killer-sudoku-challenge/id1481922813) | 1.0 (1) | Free | Games |
| [Sudoku Night Cafe](https://appshunter.io/ios/app/sudoku-night-cafe/id1432598633) | 5.0 (3) | Free | Games |
| [Impossible Sudoku Board Puzzle](https://appshunter.io/ios/app/impossible-sudoku-board-puzzle/id1498092257) | 3.7 (3) | Free | Games |
| [Sudoku: Best Brain Puzzle Game](https://appshunter.io/ios/app/sudoku-best-brain-puzzle-game/id1542443407) | — | Free | Games |
| [SUDOKU -Puzzle Games NANPURE](https://appshunter.io/ios/app/sudoku-puzzle-games-nanpure/id1531086407) | 3.0 (1) | Free | Games |
| [Classic Sudoku - 9x9 Puzzles](https://appshunter.io/ios/app/classic-sudoku-9x9-puzzles/id1472145189) | 4.7 (238) | Free | Games |

## More apps by NEXTBOOK, Inc.

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- [小学６年生漢字：ゆびドリル（書き順判定対応漢字学習アプリ）](https://appshunter.io/ios/app/id480927366)
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All apps by NEXTBOOK, Inc.: https://appshunter.io/developer/395934057

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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.*