Apps by Katsuhiko Yao
Neg Multiply – Brain Training app icon

Education

Neg Multiply – Brain Training

Katsuhiko Yao

Free download In-app purchases unconfirmed
Open on Apple

About this app

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

Latest release

What’s New

Version 2.0.3 Jun 23, 2026

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

Audience growth

Ratings growth

Steady
7-day gain +0
Ratings / day 0.0
30-day gain +0
US rating-count history
0 ratings
0 Aug 12, 2026 · 0 ratings Aug 12, 2026

Baseline captured. Growth appears after the crawler observes a changed rating count.

Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.

Price tracking

Price intelligence

1 captured event
Current Free
Historical low Free
Paid → free
Price history
Current Free
Free Aug 12, 2026 · Free Aug 12, 2026

First snapshot captured. The trend line starts after the next crawler price observation.

  1. First observed Aug 12, 2026 · 5:28 PM Free

Screenshots

Neg Multiply – Brain Training iPhone screenshotNeg Multiply – Brain Training iPhone screenshotNeg Multiply – Brain Training iPhone screenshotNeg Multiply – Brain Training iPhone screenshotNeg Multiply – Brain Training iPhone screenshot