# 数学図鑑 vs 無機化学

The clearest difference is ads: 無機化学 at none against 数学図鑑's shown. 数学図鑑's advantage is update cadence (every 2 weeks vs every 2 months) and review sentiment (100% vs 86%). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. 数学図鑑 sells 2 one-off in-app purchases and 無機化学 sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

数学図鑑 ships an update every 2 weeks, 無機化学 every 2 months. The most recent releases landed on October 8, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | 数学図鑑 | 無機化学 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **100.0% of reviews** | 86.4% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | Freemium |
| Size | 149 MB | 8 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Keisuke Minami](https://appshunter.io/developer/1719444621) | [Akihiko Kitamura](https://appshunter.io/developer/1585792497) |

## 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 |


### 無機化学

[App page](https://appshunter.io/ios/app/id6737172145)

This app helps high school students memorize inorganic chemistry concepts. It covers reaction principles, metallic elements, and non-metallic elements, utilizing a red-sheet overlay for easy output and review. User feedback is actively incorporated for improvements.

**Highlights:** Red sheet overlay for output practice, Comprehensive inorganic chemistry content, Covers reaction principles, Covers metallic elements, Covers non-metallic elements, User feedback integration

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro - 1ヶ月 | $1.99 | per month |
| Pro - 6ヶ月 | $11.99 | per 6 months |
| Pro - 12ヶ月 | $19.99 | per year |


## Frequently asked questions

### Is 数学図鑑 free?

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

### Is 無機化学 free?

無機化学 is free to download, with in-app purchases available.

### Do 数学図鑑 or 無機化学 have ads?

数学図鑑 shows ads; 無機化学 does not.

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

数学図鑑 ships an update every 2 weeks, and 無機化学 every 2 months. Most recently, 数学図鑑 was updated on October 8, 2026 and 無機化学 on October 23, 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.*