# 英単語の語源大全 vs カメ単 AI英単語帳

The clearest difference is in-app purchases: 英単語の語源大全 at none against カメ単 AI英単語帳's 1. 英単語の語源大全 also leads on iOS requirement (13.0 vs 15.0). On price, review sentiment, update cadence and ads there is nothing between them.

Both are free to download. カメ単 AI英単語帳 sells 1 in-app purchase, starting at $3.99 per month. 英単語の語源大全 asks for nothing beyond the download.

英単語の語源大全 ships an update every 5 days, カメ単 AI英単語帳 weekly. The most recent releases landed on November 3, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | 英単語の語源大全 | カメ単 AI英単語帳 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (2 ratings)](https://appshunter.io/ios/app/ai-toeic/id6739556572/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 50.0% of reviews | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 5 days** | Weekly |
| Monetization | — | Free with in-app purchases |
| Size | 50 MB | 36 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Kazuhiro.Yamada](https://appshunter.io/developer/412842594) | [HIROAKI HOSAKA](https://appshunter.io/developer/1769916994) |

## What reviewers say

### 英単語の語源大全

[App page](https://appshunter.io/ios/app/id1645815600)

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

**In-app purchases:** none


### カメ単 AI英単語帳

[App page](https://appshunter.io/ios/app/ai-toeic/id6739556572)

Effortlessly build your own vocabulary lists by inputting English or Japanese words. The app automatically generates definitions, usage examples, etymologies, and quizzes to aid memorization and learning. Capture new expressions from articles, movies, and conversations on the go.

**Highlights:** Input in English or Japanese, AI-generated definitions and examples, Create custom vocabulary lists, AI-generated quizzes for review, Quickly add words from any source, Track vocabulary growth

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic | $3.99 | per month |


## Frequently asked questions

### Is 英単語の語源大全 free?

英単語の語源大全 is free to download, with no in-app purchases.

### Is カメ単 AI英単語帳 free?

カメ単 AI英単語帳 is free to download, with in-app purchases available.

### Do 英単語の語源大全 or カメ単 AI英単語帳 have ads?

Both 英単語の語源大全 and カメ単 AI英単語帳 show ads.

### Which is updated more often, 英単語の語源大全 or カメ単 AI英単語帳?

英単語の語源大全 ships an update every 5 days, and カメ単 AI英単語帳 weekly. Most recently, 英単語の語源大全 was updated on November 3, 2026 and カメ単 AI英単語帳 on November 2, 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.*