# Moon.vn vs Cây Study

The clearest difference is ratings volume: Moon.vn at 20 against Cây Study's 1. Moon.vn also leads on update cadence (every 5 days vs fortnightly) and iOS requirement (13.0 vs 15.5). Cây Study's advantage is rating (5.0 vs 4.8). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. Moon.vn sells 19 one-off in-app purchases and Cây Study sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Cây Study holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Moon.vn has 20 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 100% of Moon.vn's written reviews are positive against 96% of Cây Study's, so the app with the better star average is not the one people write more warmly about.

Moon.vn ships an update every 5 days, Cây Study fortnightly. Both last shipped on October 30, 2026.

## The numbers

| Metric | Moon.vn | Cây Study |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (20 ratings)](https://appshunter.io/ios/app/moonvn-app-hoc-online/id6446349611/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cay-study/id6458733106/reviews)** |
| Number of ratings | **20** | 1 |
| Positive reviews | **100.0% of reviews** | 96.1% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Fortnightly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 99 MB | 37 MB |
| Requires iOS | **13.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ALADANH ONLINE EDUCATIONAL TECHNOLOGY](https://appshunter.io/developer/1677501966) | [Edmicro](https://appshunter.io/developer/1506873009) |

## What reviewers say

### Moon.vn

[App page](https://appshunter.io/ios/app/moonvn-app-hoc-online/id6446349611)

Access a vast library of video lectures aligned with textbooks and easily search for practice exams. Engage in discussions about lessons to enhance your learning experience.

**Highlights:** Extensive video lecture library, Searchable practice tests, Interactive lesson discussions, Textbook-aligned content

**In-app purchases (19)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MOON PREMIUM - HSA - LUYỆN ĐỀ 2026 | $24.99 | one-time |
| MOON PREMIUM- V-ACT - LUYỆN ĐỀ 2026 | $24.99 | one-time |
| MOON PREMIUM - TSA - LUYỆN ĐỀ 2026 | $24.99 | one-time |
| LUYỆN GIẢI ĐỀ THI ĐÁNH GIÁ NĂNG LỰC | $29.99 | one-time |
| MOON PREMIUM TN THPT - VỀ ĐÍCH 2026 | $49.99 | one-time |
| LUYỆN ĐỀ- TỪ VỰNG ĐỌC HIỂU NÂNG CAO | $49.99 | one-time |
| VIP ZOOM TOÁN HỌC - LỚP 8 - 2K12 | $49.99 | one-time |
| MOON PREMIUM TN THPT- A | $59.99 | one-time |
| VIP CTA TIẾNG ANH- ÔN THI 9 LÊN 10 | $69.99 | one-time |
| KHÓA VIP SINH VỀ ĐÍCH 2026 | $69.99 | one-time |
| CẤP TỐC LÊN 10 - TOÁN-VĂN-ANH 2026 | $79.99 | one-time |
| ĐGNL SP Hóa Sinh | $79.99 | one-time |
| LUYỆN THI TN THPT MÔN LỊCH SỬ | $79.99 | one-time |
| ĐGNL SP Toán Hoá Sinh | $99.99 | one-time |
| ĐGNL SP Văn Sử Địa | $99.99 | one-time |
| ĐGNL SP Toán Lí Anh | $99.99 | one-time |
| ĐGNL SP Toán Văn Sử | $99.99 | one-time |
| LỚP VIP ZOOM 2K9 SINH HỌC 2026 | $99.99 | one-time |
| ĐGNL SP Toán Lí Hóa Anh | $119.99 | one-time |


### 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 practice tests with explanations to improve all four language skills.

**Highlights:** AI pronunciation analysis and feedback, 1000+ vocabulary and grammar exercises, Comprehensive skill development (4 skills), Realistic practice tests with explanations, 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 Moon.vn free?

Moon.vn is free to download, with in-app purchases available.

### Is Cây Study free?

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

### Which has better reviews, Moon.vn or Cây Study?

Cây Study is rated higher. Moon.vn averages 4.8 out of 5 from 20 ratings, while Cây Study averages 5.0 from 1 ratings.

### Do Moon.vn or Cây Study have ads?

Neither Moon.vn nor Cây Study shows ads.

### Which is updated more often, Moon.vn or Cây Study?

Moon.vn ships an update every 5 days, and Cây Study fortnightly. Most recently, Moon.vn was updated on October 30, 2026 and Cây Study on October 30, 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.*