# GridCalculation — Master Math Through Grids

> Master Math Through Grids (iPhone/iPad app by Katsuhiko Yao.)

- Source: https://appshunter.io/ios/app/gridcalculation/id6745461475 (this page in markdown: same URL + `.md`)
- Developer: [Katsuhiko Yao](https://appshunter.io/developer/1543188534)
- Category: Education
- Price: Free
- Age rating: 4+
- Requires: iOS 16.6 · 16 MB
- Languages: American English, French (France), Japanese
- Released: 2025-05-06
- Data updated: 2026-08-09
- User reviews in markdown: https://appshunter.io/ios/app/gridcalculation/id6745461475/reviews.md

## What is GridCalculation?

GridCalculation is a math learning app that uses grids to help students discover patterns and relationships in numbers.

Practice addition, subtraction, multiplication, division, decimals, negative numbers, and scaling relationships between divisors and quotients through visual learning.

Features:
• Grid-based math practice
• Addition, subtraction, multiplication, and division
• Decimal calculations
• Negative number calculations
• Quotient and remainder exercises
• Scaling Division mode
• Multiple difficulty levels
• Simple and focused learning experience

Designed for elementary and middle school students to build strong calculation skills and mathematical understanding.


## Version history (last 5 releases)

### 2.2.0 — 2026-08-06

Added a confirmation before checking answers.
* A confirmation dialog is now displayed if there are unanswered cells.
* This helps prevent accidentally checking answers before finishing your work.
* Improved overall usability and user experience.

未入力時の確認機能を追加しました！
・未入力のセルがある場合、答え合わせを行う前に確認画面を表示するよう改善しました。
・誤って答え合わせを押してしまう操作を防ぎ、安心して学習できるようになりました。
・細かな操作性を改善しました。

### 2.1.7 — 2026-06-16

• Added a new Divisor & Quotient Patterns mode.
• Improved decimal division learning activities.
• Adjusted ad display behavior.
• Fixed minor bugs and improved stability.

### 2.1.6 — 2025-11-30

「商の変化をつかもう（小数）」除数を 10 倍 / 10 分の 1 にすると商がどう変化するかを学ぶモードを追加しました。
Added question type "How Divisors Change Quotients"

### 2.1.5 — 2025-11-21

わり進むわり算に新たな問題を追加しました！
Added new problems to the “Progressive Division” mode!

### 2.1.4 — 2025-11-20

新しく わり進むわり算 を追加しました！
A new progressive decimal division mode has been added!

## 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)
- [Neg Multiply – Brain Training](https://appshunter.io/ios/app/neg-multiply-brain-training/id6450744705)

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

---

*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 2026-08-09.*