# Neg Multiply – Brain Training

> Neg Multiply – Brain Training (iPhone/iPad app by Katsuhiko Yao.)

- Source: https://appshunter.io/ios/app/neg-multiply-brain-training/id6450744705 (this page in markdown: same URL + `.md`)
- Developer: [Katsuhiko Yao](https://appshunter.io/developer/1543188534)
- Category: Education, Games
- Price: Free
- Age rating: 4+
- Requires: iOS 16.6 · 32 MB
- Languages: English, Japanese
- Released: 2023-07-19
- Data updated: 2026-07-06
- User reviews in markdown: https://appshunter.io/ios/app/neg-multiply-brain-training/id6450744705/reviews.md

## What is Neg Multiply?

Master negative multiplication in just 1 minute a day
Train your brain with fast and addictive math challenges
Find the right pairs and hit the target number!

A math training app developed by a professional teacher

QuickMath Series

Boost your calculation skills and logical thinking
in just a short time

Math × Brain Training Series

Find number pairs
and reach the target value!

In this app, you can train multiplication
using negative numbers.

For example:

(−2) × (−4) = 8
(−4) × (+5) = −20

Find the correct pairs
from combinations of positive and negative numbers
to match the target value.

Learn while playing:

• Understand negative numbers
• Improve mental math skills
• Increase calculation speed

Suitable for a wide range of learners,
from advanced elementary students
to middle school math practice.

QuickMath Series

• SumX – number pair puzzle
• SumXMinus – negative number training
• Common Divisor – divisor brain training
• Exponent – power calculation challenge


## Version history (last 5 releases)

### 2.0.3 — 2026-06-23

Improved the Result View layout on certain tablet devices, including the iPad Air 11-inch.

* Fixed layout issues on the result screen
* Improved visibility of scores and buttons
* Enhanced overall user experience

### 2.0.2 — 2026-05-03

* Improved the stability of the in-app review prompt.
* Adjusted some screen transition behavior for a smoother experience.

### 1.0.10 — 2026-03-26

リザルト画面の改善を開始しました。
バナー広告の表示を追加し、アプリの安定性も向上しています。

MultipleToMinusXは
数学教師が開発した算数トレーニングアプリです。
今後も授業で使いやすいアップデートを続けていきます。

### 1.0.9 — 2026-02-24

学習に集中できるよう、動作の安定性と操作性を改善しました。
Improved stability and usability to help users stay focused.

### 1.0.8 — 2025-12-28

・一部デザインの調整を行いました。
・Minor UI adjustments.

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## More apps by Katsuhiko Yao

- [QuickAge](https://appshunter.io/ios/app/quickage/id1545922757)
- [QuickCheck3](https://appshunter.io/ios/app/quickcheck3/id1566831890)
- [AddToMinusX](https://appshunter.io/ios/app/addtominusx/id6443640661)
- [Multiply Pairs – Mental Math](https://appshunter.io/ios/app/multiply-pairs-mental-math/id6448858474)
- [Power of 2](https://appshunter.io/ios/app/power-of-2/id6450391335)

All apps by Katsuhiko Yao: https://appshunter.io/developer/1543188534

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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 2026-07-06.*