Apps by Katsuhiko Yao
Make 10 - Mental Math app icon

Education

Make 10 - Mental Math

Katsuhiko Yao

Free download In-app purchases unconfirmed
Open on Apple

About this app

Created by a Math Teacher A 1-minute Math Training App QuickMath Series Train your calculation skills and thinking power with short and fun math challenges. Find pairs of numbers and reach the target number! Not only “Make 10” puzzles — you can train with target numbers from 6 to 20 across different difficulty levels. Learn while playing and improve: • Number sense • Mental math • Calculation speed Perfect for quick daily brain training. Suitable for a wide range of learners — from advanced elementary school 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 3.1.1 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

Make 10 - Mental Math iPhone screenshotMake 10 - Mental Math iPhone screenshotMake 10 - Mental Math iPhone screenshotMake 10 - Mental Math iPhone screenshotMake 10 - Mental Math iPhone screenshotMake 10 - Mental Math iPhone screenshot