# Gamma Books vs Cây Study

The clearest difference is rating: Cây Study at 5.0 against Gamma Books's 3.7. Gamma Books's advantage is in-app purchases (none vs 10) and ratings volume (3 vs 1). On price, ads and device support there is nothing between them.

Both are free to download. Cây Study sells 10 one-off in-app purchases. Gamma Books asks for nothing beyond the download.

Cây Study holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

## The numbers

| Metric | Gamma Books | Cây Study |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/gamma-books/id6449405372/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cay-study/id6458733106/reviews)** |
| Number of ratings | **3** | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 2 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 37 MB | 37 MB |
| Requires iOS | **12.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [ETS DATA AND PUBLISHING JOINT STOCK COMPANY](https://appshunter.io/developer/1688927494) | [Edmicro](https://appshunter.io/developer/1506873009) |

## What reviewers say

### Gamma Books

[App page](https://appshunter.io/ios/app/gamma-books/id6449405372)

Access a wide range of language learning books, including test preparation, junior-level content, and teaching skills. Enhance your learning with accompanying audio files, answer keys, and trial reads. Earn rewards and discounts on purchases.

**Highlights:** New book releases, Search for reference and language books, Access accompanying resources (audio, keys), Purchase books with discounts, Earn points and rewards, Get English learning tips, Direct book consultation

**Features:** macOS Compatibility

**In-app purchases:** none


### Cây Study

[App page](https://appshunter.io/ios/app/cay-study/id6458733106)

This language learning app focuses on pronunciation, offering AI-powered feedback on tone and intonation. It includes over 1000 vocabulary and grammar exercises, plus 100 practice tests with detailed explanations. Personalized course packages cater to individual learning needs.

**Highlights:** Native-like pronunciation training, AI-powered tone and intonation analysis, 1000+ vocabulary and grammar exercises, 100+ practice tests, Personalized course packages, AI scoring and answer analysis

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Khóa từ vựng TOEIC 450-700 | $2.99 | one-time |
| Từ vựng TOEIC 0-450 | $2.99 | one-time |
| Khóa từ vựng TOEIC 700+ | $2.99 | one-time |
| Phát âm tiếng anh | $2.99 | one-time |
| 3000 từ vựng tiếng anh | $4.99 | one-time |
| Từ vựng IELTS Ban0-4.5 | $6.99 | one-time |
| Bộ 20 đề IELTS thi online | $6.99 | one-time |
| Từ vựng IELTS Band 4.5-5.5 | $7.99 | one-time |
| Từ vựng IELTS Band 6.5+ | $9.99 | one-time |
| Từ vựng IELTS Band 5.5-6.5 | $9.99 | one-time |


## Frequently asked questions

### Is Gamma Books free?

Gamma Books is free to download, with no in-app purchases.

### Is Cây Study free?

Cây Study is free to download, with in-app purchases available.

### Which has better reviews, Gamma Books or Cây Study?

Cây Study is rated higher. Gamma Books averages 3.7 out of 5 from 3 ratings, while Cây Study averages 5.0 from 1 ratings.

### Do Gamma Books or Cây Study have ads?

Neither Gamma Books nor Cây Study shows ads.

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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.*