# 数学図鑑 vs ECG Articles

The clearest difference is in-app purchases: ECG Articles at none against 数学図鑑's 2. ECG Articles also leads on update cadence (daily vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

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

数学図鑑 ships an update every 2 weeks, ECG Articles daily. The most recent releases landed on October 8, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | 数学図鑑 | ECG Articles |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 2 weeks | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 149 MB | 4 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 17+ |
| Developer | [Keisuke Minami](https://appshunter.io/developer/1719444621) | [KAIRI DAIHO](https://appshunter.io/developer/1845415966) |

## 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 |


### ECG Articles

[App page](https://appshunter.io/ios/app/ecg-articles/id6756026264)

**Features:** macOS Compatibility

**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 ECG Articles free?

ECG Articles is free to download, with no in-app purchases.

### Do 数学図鑑 or ECG Articles have ads?

Both 数学図鑑 and ECG Articles show ads.

### Which is updated more often, 数学図鑑 or ECG Articles?

数学図鑑 ships an update every 2 weeks, and ECG Articles daily. Most recently, 数学図鑑 was updated on October 8, 2026 and ECG Articles on October 1, 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.*