# Sudoku・

> Feudal Japan-themed Sudoku game with dual keypads, smart notes, and error checking. (iPhone/iPad app by Optime Software LLC.)

- Source: https://appshunter.io/ios/app/sudoku/id397227037 (this page in markdown: same URL + `.md`)
- Developer: [Optime Software LLC](https://appshunter.io/developer/289278460)
- Category: Games, Entertainment, Board, Puzzle
- Price: Free with in-app purchases
- Rating: 4.60/5 from 10,877 App Store ratings · 438 written reviews indexed
- Age rating: 4+
- Requires: iOS 11.0 · 133 MB
- Languages: American English
- Released: 2010-12-14
- Data updated: 2026-08-28
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/sudoku/id397227037/reviews.md

## What is Sudoku・?

Take a journey to feudal Japan with Sudoku Free!  With beautiful graphics and killer features, Sudoku Free! is the best Sudoku app available for iOS.

DUAL KEYPAD ENTRY 

Two separate keypads, one for entries and one for notes, allow you to enter values quickly and easily.  No more tedious switching between entry mode and note mode to complete your puzzle.

SMART NOTES

The optional auto-notes feature enters all of the notes into the puzzle for you and keeps them updated as you solve.  If you don't want that much help, the optional smart notes feature automatically deletes values from notes you have entered manually when they are no longer valid.  

ERROR CHECKING

The optional error checker tells you when you have entered an incorrect or illogical value, allowing you to catch errors early and preventing needless frustration.    

MULTIPLE DIFFICULTY LEVELS

Five difficulty levels, from easy to insane, ensure that you will be able to find a puzzle that matches your skill level.  With 3,000 total puzzles, you won't run out of puzzles any time soon.

Download Sudoku Free! for free today and start playing Sudoku the way it was meant to be played!

## Key features

- Dual keypad entry
- Smart notes (auto-notes & manual deletion)
- Optional error checking
- Multiple difficulty levels
- 3,000+ puzzles
- Feudal Japan theme

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Puzzle Pack - Genpei | $0.99 | one-time |
| Puzzle Pack - Norada | $0.99 | one-time |
| Puzzle Pack - Meiji | $0.99 | one-time |
| Puzzle Pack - Taisho | $0.99 | one-time |
| Puzzle Pack - Showa | $0.99 | one-time |
| Puzzle Pack - Sakai | $0.99 | one-time |
| Puzzle Pack - Subushi | $0.99 | one-time |
| Puzzle Pack - Kurikara | $0.99 | one-time |
| Puzzle Pack - Miura | $0.99 | one-time |
| Puzzle Pack - Ishizu | $0.99 | one-time |


## What do users think of Sudoku・?

Overall sentiment: positive

**Pros**

- 🚀 Great game
- 👍 User-friendly interface
- 👍 Challenging levels
- 👍 Ability to make notes
- 🤓 Keeps mind active
- 🕰️ Good time filler

**Cons**

- 🐛 Crashes/freezes
- 💰 Excessive ads/in-app purchases
- 🔍 Difficult to see numbers/highlights
- 🔄 Timer issues (doesn't reset)
- 🙄 Unnecessary changes to UI

**Commonly reported bugs**

- App crashes when trying to access higher difficulty levels
- Inability to restore previously purchased content
- Clipboard data being accessed without user permission

**Most requested features**

- Option to disable ads/in-app purchases
- More customization options (colors, themes, etc.)
- Ability to listen to own music during gameplay
- Better handling of saved progress/purchases across devices

## Recent user reviews (10 of 438)

All indexed reviews: https://appshunter.io/ios/app/sudoku/id397227037/reviews.md

### 1/5 — Too many Ads

*2026-08-14, version 2.00*

I spend more time watching ads than playing the game.

### 1/5 — Where are the difficult puzzles??

*2026-08-07, version 2.00*

Shouldn’t have to pay for more difficult puzzles.

### 2/5 — I am so upset: now has ads

*2026-04-13, version 2.00*

I have been playing on this app for years. I pay for new puzzles and enjoyed the ad free experience. Now, they have ads with no options to get ride of them. This game was my peaceful getaway. Please give us the option of no ads. If I pay for packages… idk why I need to endure ads. After years of being a loyal customer, I may have to find a new Sudoku app. Disappointing.

### 1/5 — Worst?

*2026-04-05, version 2.00*

I hate almost all sudoku apps on the App Store but this is probably the worst one, it’s so bad it makes me and to rate the other ones 2 stars instead of the 1 star they deserve

### 2/5 — Even More Ads

*2026-03-03, version 2.00*

I’ve had this app downloaded on my phone for years. I understand the app is feee so I have never been bothered by the ads that play between games or when you first open the app, but now there is also an obnoxious flashing, bright colored ad on the actual game board as you play which is very distracting while playing and also ugly. The best thing about this app was that after the ad was done, you weren’t bothered by them again in the same game session unless you closed out the app. Off to the next Sudoku app that’s actually ad free

### 1/5 — But it looks so good

*2026-02-16, version 2.00*

I’d love to know how the game is, in game, but I never got there. The opening screen requires you to agree to the terms to play. It doesn’t let you read the terms, but you’ve got to agree to them. 

Then I was greeted with a full screen add to play a game. I refused to play the game. It kept going for several very long minutes and refused to give me an exit screen. I finally complied, just to move forward. I played the game for the better part of 5 very long minutes, to be given the chance to download the game. So I did. I still don’t have an exit button. 

I’m going to delete and go play the game it advertised (after I make sure it’s not owned by the same parent company). 

So much potential, ruined by greed. I’d have paid probably $10 for the game because it looked so nice. No chance I’m sitting through adds and I’m certainly not renting the game for a subscription fee. 

Legendary fail. 

Possibly the worst app experience in 15 years.

Wish I could attach a screenshot of the downloaded available game to go to with no method of exiting.

I’ve closed and reopened the app only to have to start the process over again, with the same advertisement, which turned out to be a bait and switch add. The downloaded game is nothing like the game you’re forced to play.

### 1/5 — adverts galore

*2026-02-13, version 2.00*

adverts adverts adverts adverts adverts

### 1/5 — Unplayable

*2026-01-24, version 2.00*

Ads are scams. They do not let you skip. I can’t even get to the main menu to play the game.

### 1/5 — Ads

*2026-01-15, version 2.00*

So many game ads with no exit. Can’t even get to the game.  Deleted.

### 1/5 — Unusable

*2026-01-01, version 2.00*

1/1/26 - basically unusable now. It opens with ads for apps that you can’t bypass. You have to wait for the demo to finish to be able to start a game. It takes a long long time for the demo to finish.  Don’t bother installing.

## Frequently asked questions about Sudoku・

### What is this app?

This app offers a Sudoku puzzle experience with a unique feudal Japan theme. It includes advanced features like dual keypad entry for faster input, smart note-taking options, and an error checker to help you solve puzzles more efficiently.

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

Key features include a dual keypad system for separate entry and note-taking, optional auto-notes that fill in possibilities, and a smart notes feature that automatically removes invalid notes. It also has an optional error checker and five difficulty levels with over 3,000 puzzles.

### Is this app free to download and play?

Yes, the app is free to download and play. It is supported by ads and offers in-app purchases, which may provide additional content or features.

### What platforms is this app available on?

Based on the description, this app is available for iOS devices. It is designed to offer a smooth and engaging puzzle-solving experience on compatible Apple devices.

### Who is this app designed for?

This app is designed for anyone who enjoys playing Sudoku puzzles. It caters to both beginners with its easier difficulty levels and experienced players with its 'insane' levels and advanced features like smart notes and error checking.

## Version history (last 5 releases)

### 2.00 — 2024-02-20

• Added support for Autolayout 
• Fixed issues with smart buttons and smart notes 
• Minor bug fixes

### 1.65 — 2018-06-29

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

• GDPR support
• Minor bug fixes

### 1.60 — 2017-10-03

• New More Games screen
• Minor bug fixes

### 1.51 — 2015-12-17

• Fixed issue which was causing puzzles to have duplicate numbers on iOS 7 devices
• Fixed issue which was causing application to crash when game board screen was exited
• Updated for iOS 9
• Minor bug fixes

### 1.50 — 2015-10-05

• Updated for iOS 9
• Minor bug fixes

## Apps similar to Sudoku・

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Sudoku - No Adverts, Ad Free!](https://appshunter.io/ios/app/sudoku-no-adverts-ad-free/id521559009) | 4.6 (604) | Free | Games |
| [Sudoku SE](https://appshunter.io/ios/app/sudoku-se/id285755462) | 4.6 (1,875) | Free | Games |
| [▻Sudoku - Classic Brain Game](https://appshunter.io/ios/app/sudoku-classic-brain-game/id366247306) | 4.8 (658,636) | Free | Games |
| [▻Sudoku +](https://appshunter.io/ios/app/sudoku-plus/id372283316) | 4.8 (14,463) | $4.99 | Games |
| [⋆Sudoku](https://appshunter.io/ios/app/sudoku/id418044512) | 4.7 (161,022) | Free | Games |
| [Sudoku ∙](https://appshunter.io/ios/app/sudoku/id727577974) | 4.7 (1,434) | Free | Games |

## More apps by Optime Software LLC

- [Tic Tac Toe ∙](https://appshunter.io/ios/app/tic-tac-toe/id289278457)
- [Four in a Row.](https://appshunter.io/ios/app/four-in-a-row/id292882605)
- [Four in a Row Pro](https://appshunter.io/ios/app/four-in-a-row-pro/id294204179)
- [Tic Tac Toe Pro](https://appshunter.io/ios/app/tic-tac-toe-pro/id294293446)
- [Checkers ・](https://appshunter.io/ios/app/checkers/id294664915)
- [Checkers Premium](https://appshunter.io/ios/app/checkers-premium/id294841947)

All apps by Optime Software LLC: https://appshunter.io/developer/289278460

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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 2026-08-28.*