# 数学図鑑 vs 不定方程式ガチャ

The clearest difference is price: 数学図鑑 at Free against 不定方程式ガチャ's $3.99. 不定方程式ガチャ's advantage is in-app purchases (none vs 2) and ads (none vs shown). On update cadence, device support and iOS requirement there is nothing between them.

数学図鑑 is free to download; 不定方程式ガチャ costs $3.99 up front. 数学図鑑 sells 2 one-off in-app purchases. 不定方程式ガチャ asks for nothing beyond the download.

数学図鑑 ships an update every 2 weeks, 不定方程式ガチャ every 9 days. The most recent releases landed on October 8, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 数学図鑑 | 不定方程式ガチャ |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | **Every 9 days** |
| Monetization | Free with in-app purchases | — |
| Size | 149 MB | 11 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Keisuke Minami](https://appshunter.io/developer/1719444621) | [Akira Hiraoka](https://appshunter.io/developer/1668714727) |

## What reviewers say

### 数学図鑑

[App page](https://appshunter.io/ios/app/id6499109813)

This app uses animations and dynamic visuals to explain complex high school math concepts. It aims to make abstract ideas intuitive and engaging for students and educators alike. Explore calculus, geometry, and equations through visual learning.

**Highlights:** Animated explanations of math concepts, Dynamic visual representations, Covers calculus, geometry, and equations, Intuitive understanding of abstract ideas, Aids students and educators

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告の削除 | $1.99 | one-time |
| 広告の削除+開発者への支援 | $2.99 | one-time |


### 不定方程式ガチャ

[App page](https://appshunter.io/ios/app/id6757098537)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 数学図鑑 free?

数学図鑑 is free to download, with in-app purchases available.

### Is 不定方程式ガチャ free?

不定方程式ガチャ costs $3.99, with no in-app purchases.

### Do 数学図鑑 or 不定方程式ガチャ have ads?

数学図鑑 shows ads; 不定方程式ガチャ does not.

### Which is updated more often, 数学図鑑 or 不定方程式ガチャ?

数学図鑑 ships an update every 2 weeks, and 不定方程式ガチャ every 9 days. Most recently, 数学図鑑 was updated on October 8, 2026 and 不定方程式ガチャ on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*