# Futoshiki Puzzle Game — Inequality Brain Logic Solver

> Logic grid puzzle game with inequality constraints, similar to Sudoku. (iPhone/iPad app by KEREM BAYDOGAN.)

- Source: https://appshunter.io/ios/app/futoshiki-puzzle-game/id846765771 (this page in markdown: same URL + `.md`)
- Developer: [KEREM BAYDOGAN](https://appshunter.io/developer/846765774)
- Category: Games, Education, Board, Puzzle
- Price: Free with in-app purchases
- Rating: 4.60/5 from 455 App Store ratings · 66 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 113 MB
- Languages: American English, French (France), German (Germany), Italian, Japanese, Korean, Russian, Chinese (Simplified, China), European Spanish, Turkish
- Released: 2015-07-14
- Data updated: 2026-08-20
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/futoshiki-puzzle-game/id846765771/reviews.md

## What is Futoshiki Puzzle Game?

If you were seduced by sudoku, prepare for futoshiki fever - The Guardian

Futoshiki may look straightforward, but the experienced puzzler knows not to be fooled by appearances.

------------------------------

A simple and challenging puzzle game that will enhance your mental flexibility! With beautiful graphics and killer features, Futoshiki Free is the best brain-teaser puzzle for iPhones and iPads. 

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.

MULTIPLE PUZZLE SIZES AND DIFFICULTY LEVELS

Six puzzle size, from 4x4 to 9x9, Four difficulty levels, from easy to extreme, ensure that you will be able to find a puzzle that matches your skill level. Top class puzzles with selectable level of difficulty. With 6,000 total puzzles, you won't run out of puzzles any time soon.

ONLINE LEADERBOARDS

Thanks to Game Center, you can now rank and compare futoshiki scores against friends and other puzzle lovers.

ERROR CHECKING

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

GAME FEATURES

- Thousands of puzzles in 4 different difficulty settings.
- Six different puzzle size, from 4x4 to 9x9.
- Game Center support for leaderboards.
- Great statistics that help track your progress.

TECHNICAL FEATURES
- Futoshiki is a universal app, it works on iPhones, iPods and iPads seamlessly.
- Futoshiki has graphics for Normal, Retina and even Retina-HD displays. No blurry graphics. Everything is crystal clear. Download now to see it with your own eyes.

WHAT IS FUTOSHIKI
- Futoshiki is a grid puzzle similar to Sudoku in that each column and row must contain exactly one instance of each number.
- The only difference being that in between some squares there are less-than and greater-than symbols that act as clues.
- At the beginning only some squares are revealed, the player must discover the rest.
- Each puzzle has an unique solution and no guessing is required to discover it.
- It is very popular in Japan, England, China and several other countries.


Download Futoshiki for Free!

## Key features

- Dual keypad entry
- Multiple puzzle sizes (4x4 to 9x9)
- Four difficulty levels
- Thousands of puzzles
- Online leaderboards
- Error checking
- Progress tracking statistics

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |
| Unlock All Puzzles | $2.99 | one-time |


## What do users think of Futoshiki Puzzle Game?

Overall sentiment: positive

**Pros**

- 👍 Best Futoshiki app available on app store
- 💡 Innovative notes/pencil marks feature for candidate numbers
- 🎮 Multiple difficulty levels and grid sizes (4x4, 6x6, 9x9)
- 🧠 Excellent logic puzzle gameplay and challenge
- 💰 Generous free version with plenty of content
- 🎨 Clean, intuitive, and well-designed interface
- 🎯 Two game variations (standard and Adjacent mode)
- ⏱️ Good for short or long gaming sessions
- 🔄 Smooth operation and responsive controls

**Cons**

- 📺 Intrusive and excessive full-screen advertisements
- 💸 Expensive pricing to remove ads and unlock all levels
- 🔋 High battery consumption for a simple puzzle game
- 🔊 Harsh error sound that startles players
- 📱 Display scaling issues on newer phones (iPhone X, 7+)
- 💾 Game progress not saved when app is closed
- 🎯 Inconsistent difficulty labeling across puzzles
- ⚠️ Some unsolvable puzzles exist in the collection
- 🐛 Ads blocking game controls and numbers

**Commonly reported bugs**

- Display not centered on iPhone X and newer models
- Comparison symbols (< >) not visible on newer phones
- Ads covering pause/settings buttons and game numbers
- Game not saving progress when app is closed
- Ads reappearing after paying for ad-free version
- App asking for review repeatedly even after submission
- Some 6x6 puzzles are unsolvable
- Difficulty levels not accurately labeled
- Menu button cutting into game grid on some devices

**Most requested features**

- Auto-removal of pencil marks when a number is placed
- Option to toggle automatic error highlighting on/off
- Game save/resume functionality for incomplete puzzles
- Cross-device synchronization (Game Centre/iCloud)
- Check answer feature to verify correctness
- Larger, more spaced-out button rows to prevent accidental clicks
- Combined purchase option for ads removal AND level unlock
- Softer error notification sound
- Ability to disable star/competitive rating system

## Recent user reviews (10 of 66)

All indexed reviews: https://appshunter.io/ios/app/futoshiki-puzzle-game/id846765771/reviews.md

### 5/5 — Best version of Futoshiki

*2025-11-13, version 3.1.0*

This is by far the best version of Futoshiki on the app store. There are enough levels to present an excellent challenge and the presentation and mechanics of the game make for a very pleasurable gaming experience. Superb.

### 5/5 — Nicely presented and simple!

*2025-02-05, version 2.8.0*

After playing these puzzles in the daily newspaper it then found this app.  The free version was quite generous, but after many years I returned to the app once again and purchased all the levels.  Great value.  Would have been nice if there was a deal to unlock all and also remove adds, but can’t grumble at a few quid for many hours of content.

### 4/5 — Harder than it seemed.

*2024-09-30, version 2.8.0*

Harder than it seemed.

### 3/5 — AJBT1

*2024-09-15, version 2.8.0*

Should I be able to find each number logically, or do I have to make intelligent guesses?

### 5/5 — J’adore

*2024-07-13, version 2.8.0*

Bien fait! Avec les petites notes que l’on peut placer.
Par contre, ça serait bien que les notes s’´efface lorsqu’on place un gros chiffre.
Merci pour cette application

### 1/5 — Nice game ruined by two flaws

*2023-12-03*

This is a nice game but I will be uninstalling due to two flaws. First, the full screen ads are so annoyingly intrusive that it is imposdible to enjoy the game unless you pay to remove ads. Second, the game is always asking me to submit a review, even after I have done so. Fix these problems and I will reinstall

**Developer response:** I am really sorry to hear that you are not satisfied with my app. If you contact me via the email address in the app, I can quickly solve the problems you are experiencing.

### 4/5 — Beware

*2023-09-12*

Not all these puzzles are able to be solved..the few that I found are in the 6 x 6 grid..so don’t be disappointed if you spend lots of time and do not succeed.
It would be appreciated if the designer would rectify these errors

**Developer response:** This is the first time someone told me there are unsolvable puzzles. Please let me know which puzzles are unsolvable so I can fix them or show you the solution.

### 4/5 — Frustrating

*2023-06-22, version 2.7*

A good game. Very clear easy to play but hate the way it records mistakes as errors are because of motor control and visual issues and years of playing a better version which removes numbers once they are all used. Cannot see any need to give stars as this is very babyish or nerd competitive idea.

### 5/5 — Lots of challenging fun!

*2023-05-10*

Really enjoy this as an alternative to Sudoku. Different mind set, especially with the two variations. Different levels make it fun for anyone while options in puzzle size make it easy to select based on available time. Give it a try!

### 5/5 — Very Good design

*2022-10-31, version 2.7*

I've used many futoshiki apps
and THIS ONE is the BEST

## Frequently asked questions about Futoshiki Puzzle Game

### What is Futoshiki Puzzle Game?

Futoshiki Puzzle Game is a logic grid puzzle that enhances mental flexibility. It's similar to Sudoku, but includes inequality symbols (<, >) between squares as clues. Players must fill the grid with numbers based on these constraints, ensuring each row and column contains unique numbers.

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

The app offers dual keypad entry for quick input, multiple puzzle sizes from 4x4 to 9x9, and four difficulty levels. It also includes an error checker to identify illogical entries, online leaderboards via Game Center, and detailed statistics to track your progress.

### How much does Futoshiki Puzzle Game cost?

The app is free to download and play. It offers in-app purchases, which may include additional puzzle packs or features, but the core gameplay is accessible without cost.

### What devices is Futoshiki Puzzle Game compatible with?

This is a universal app, meaning it works seamlessly on iPhones, iPods, and iPads. It also features graphics optimized for Normal, Retina, and Retina-HD displays for a clear visual experience.

### Who would enjoy playing this game?

This game is ideal for anyone who enjoys logic puzzles and brain teasers, especially those who are fans of Sudoku. It's designed for players looking to improve their mental flexibility and enjoy a challenging yet straightforward puzzle experience.

## Version history (last 5 releases)

### 3.1.0 — 2025-11-11

Fixes an issue preventing previously purchased full-access users from restoring access.

### 3.0.0 — 2025-11-10

bug fixes and performance improvements

### 2.8.0 — 2023-09-15

minor bug fix

### 2.7 — 2019-06-19

Minor Bug Fixes

### 2.6 — 2019-05-17

Minor Bug Fixes

## Apps similar to Futoshiki Puzzle Game

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [100×3 Logic Games](https://appshunter.io/ios/app/1003-logic-games/id1508571053) | 4.9 (87) | Free | Games |
| [Kakuro Challenge - Cross Sum](https://appshunter.io/ios/app/kakuro-challenge-cross-sum/id1185788482) | 4.0 (64) | Free | Games |
| [100s Logic Games - Sudokus](https://appshunter.io/ios/app/100s-logic-games-sudokus/id1660755706) | 4.7 (23) | Free | Games |
| [Hitori - Logic Puzzles](https://appshunter.io/ios/app/hitori-logic-puzzles/id1250981450) | 3.8 (44) | Free | Games |
| [100² Logic Games-More puzzles](https://appshunter.io/ios/app/100-logic-games-more-puzzles/id1460567629) | 4.8 (227) | Free | Games |
| [Kakuro - Classic](https://appshunter.io/ios/app/kakuro-classic/id6455461477) | 4.8 (56) | Free | Games |

## More apps by KEREM BAYDOGAN

- [Sudoku Variants - 40+ Puzzles](https://appshunter.io/ios/app/sudoku-variants-40-plus-puzzles/id1504763943)

All apps by KEREM BAYDOGAN: https://appshunter.io/developer/846765774

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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 2026-08-20.*