# 無機化学 vs 数学図鑑

The clearest difference is in-app purchases: 無機化学 at none against 数学図鑑's 2. 無機化学 also leads on ads (none vs shown) and update cadence (every 3 days vs every 2 weeks). On price and review sentiment there is nothing between them.

Both are free to download. 数学図鑑 sells 2 one-off in-app purchases. 無機化学 asks for nothing beyond the download.

無機化学 ships an update every 3 days, 数学図鑑 every 2 weeks. The most recent releases landed on September 22, 2026 and June 4, 2026 respectively.

## The numbers

| Metric | 無機化学 | 数学図鑑 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/id1351078183/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 98.1% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 days** | Every 2 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 38 MB | 149 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Hideki Touhara](https://appshunter.io/developer/1268738829) | [Keisuke Minami](https://appshunter.io/developer/1719444621) |

## What reviewers say

### 無機化学

[App page](https://appshunter.io/ios/app/id1351078183)

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

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is 無機化学 free?

無機化学 is free to download, with no in-app purchases.

### Is 数学図鑑 free?

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

### Do 無機化学 or 数学図鑑 have ads?

数学図鑑 shows ads; 無機化学 does not.

### Which is updated more often, 無機化学 or 数学図鑑?

無機化学 ships an update every 3 days, and 数学図鑑 every 2 weeks. Most recently, 無機化学 was updated on September 22, 2026 and 数学図鑑 on June 4, 2026.

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