# Killer Sudoku X - Brain Puzzle — No pop-ups, banner ads only.

> Logic number puzzle game with cages, offering free play and customizable settings. (iPhone/iPad app by ShovelGames Inc..)

- Source: https://appshunter.io/ios/app/killer-sudoku-x-brain-puzzle/id1642479638 (this page in markdown: same URL + `.md`)
- Developer: [ShovelGames Inc.](https://appshunter.io/developer/1342960363)
- Category: Games, Puzzle, Word
- Price: Free
- Rating: 4.90/5 from 12 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 23 MB
- Languages: American English, Japanese
- Released: 2022-09-12
- Data updated: 2026-08-13
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/killer-sudoku-x-brain-puzzle/id1642479638/reviews.md

## What is Killer Sudoku X?

A number puzzle game with few adverts and no charging, that you can enjoy from beginning to end!
It's constantly saving the data, so you can finish it whenever you want!

A wide range of puzzles, from easy to challenging. Puzzles for newcomers too!

There are no advertisements during the game so that you can concentrate.
And there is no troublesome membership registration at all! You can play them all for free.


KillerSudoku is characterised by dotted areas called cages.

Although its basic rules are same as in classic Sudoku, there is a grouping of individual cells called a cage.
Only two rules apply to the cage.

-The number in top left corner is the sum of numbers in cage.
-The same number cannot be entered in cage.


[ Rules of KillerSudoku ]

-Same as Sudoku, single numbers from 1 to 9 are placed in 3 x 3 blocks surrounded by row, column
and bold lines.
-The same numbers cannot be placed in the row, column, block and cage
-Target is to fill numbers in all the cells.

There are other puzzles called SumSudoku and Sum Cross, but in general basic rules are the same.


[ Point of App ]

-Customisable with various settings to make it easier to do!
-Significantly fewer adverts than any other free game!
-Don't worry about how many mistakes you make! Take your time, enjoy it at your own pace!


Enjoy to killerSudoku Puzzles!!

## Key features

- Killer Sudoku cage mechanics
- SumSudoku and Sum Cross puzzles
- Customizable settings
- Progress saving
- Ad-supported gameplay
- Free to play

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/killer-sudoku-x-brain-puzzle/id1642479638/reviews.md

### 4/5 — バグがなければ満点

*2023-05-28*

5/29追記　ボタンは見やすくなりましたがバグは直っていないようです。相変わらず一手戻すとメモが復活します。

他のアプリだと問題を解いている途中に広告が挟まったり、ちょっとした押し間違いが即誤答になってしまったり、そもそも間違いがその場で分かってしまうのでそれがヒントになってしまってヌルゲー化したり、ストレスが溜まっていたので、それらが解消されて助かりました。

惜しい点としては、ひとつは通常の解答入力のモードとメモのモードが見分けがつきにくいこと。
ボタンの色をもう少しわかりやすく色変えして欲しいです。字が少し小さくなって少しだけボタンの色が薄くなるだけなので頻繁に誤入力します。

もう一つがバグ。メモ書きを消すのに真ん中の消しゴムを使うと、一手戻った時に何故か消したメモ書きが復活するんですよね…。
おかげで消しゴムが使えません。
あとプレイ状況を自動で記録してくれるみたいなのですが、これも挙動が不安定で、続きから？を選ぶと前々回くらいの奴が出てきたことがありました。
バグ報告ができないのでここで書き込むくらいしかできません。修正されるといいのですが。

### 5/5 — 超難問です

*2022-11-20*

終わり近くまできてダメとなると初めからやり直し。途中経過を保存できるとありがたい。

### 4/5 — 難しい！

*2022-11-02*

解けないわけではないけど、ヒントとか無いので歯ごたえゴリゴリな感じです。
枠線消したいけどよく分からないので－★です。

### 5/5 — うん

*2022-10-12*

いいね

## Frequently asked questions about Killer Sudoku X

### What are the basic rules of Killer Sudoku X?

Killer Sudoku X follows classic Sudoku rules, placing numbers 1-9 in 3x3 blocks, rows, and columns without repetition. Additionally, cages with dotted areas have a sum indicated in the top-left corner, and numbers within a cage cannot repeat.

### Does Killer Sudoku X have ads?

Yes, Killer Sudoku X contains advertisements. The developer notes that there are significantly fewer adverts than other free games, allowing for concentration during gameplay.

### Can I play Killer Sudoku X offline?

The description states that the game's data is constantly saved, allowing you to finish it whenever you want. While not explicitly stated as offline, this suggests the ability to play without constant internet connection.

### Is there a membership registration for Killer Sudoku X?

No, there is no troublesome membership registration required for Killer Sudoku X. You can play all the puzzles for free without signing up.

### What devices does Killer Sudoku X support?

Killer Sudoku X is available on iPhone, iPad, and iPod devices, indicating compatibility with Apple's iOS ecosystem.

### How often is Killer Sudoku X updated?

The latest version, 1.3.2, was last updated on April 29, 2026. This indicates a recent update, though the frequency of future updates is not specified.

### What is the age rating for Killer Sudoku X?

Killer Sudoku X has an age rating of 4+, making it suitable for a wide range of players, including younger audiences interested in logic puzzles.

### What makes Killer Sudoku X different from classic Sudoku?

The primary difference is the introduction of 'cages,' which are groups of cells with a specified sum. This adds an extra layer of logic and calculation to the traditional Sudoku gameplay.

## Version history (last 5 releases)

### 1.4.1 — 2026-07-18

- System updates

### 1.4 — 2026-07-14

- System updates

### 1.3.2 — 2026-04-29

- System updates

### 1.3.1 — 2026-03-16

- System updates

### 1.3 — 2026-03-12

- System updates

## Apps similar to Killer Sudoku X

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Kakuro u](https://appshunter.io/ios/app/kakuro-u/id306200861) | 4.6 (299) | Free | Games |
| [Tap Block Away](https://appshunter.io/ios/app/tap-block-away/id6473601761) | 4.5 (432) | Free | Games |
| [Word Blocks - Word Game](https://appshunter.io/ios/app/word-blocks-word-game/id1613339445) | 4.7 (8,923) | Free | Games |
| [Crozzle - Crossword Puzzles](https://appshunter.io/ios/app/crozzle-crossword-puzzles/id6474729809) | 4.8 (7,091) | Free | Games |
| [Zendoku-Sudoku Game](https://appshunter.io/ios/app/zendoku-sudoku-game/id6749930364) | 4.9 (3,908) | Free | Games |
| [The Daily Puzzle](https://appshunter.io/ios/app/the-daily-puzzle/id1596466954) | 4.7 (2,665) | Free | Games |

## More apps by ShovelGames Inc.

- [Sudoku Purple: Aesthetic](https://appshunter.io/ios/app/sudoku-purple-aesthetic/id975090531)
- [Mahjong Solitaire 100](https://appshunter.io/ios/app/mahjong-solitaire-100/id1049680223)
- [Mahjong Solitaire 1000+](https://appshunter.io/ios/app/mahjong-solitaire-1000-plus/id1153870066)
- [UmaPad - My Keiba Calc](https://appshunter.io/ios/app/umapad-my-keiba-calc/id1504803743)
- [YASUINE - Price Comparison](https://appshunter.io/ios/app/yasuine-price-comparison/id1563879846)

All apps by ShovelGames Inc.: https://appshunter.io/developer/1342960363

---

*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 2026-08-13.*