# 单词树 vs 課咖ClassKey

The clearest difference is ads: 单词树 at none against 課咖ClassKey's shown. 課咖ClassKey's advantage is update cadence (every 2 weeks vs every 2 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. 单词树 sells 6 in-app purchases, starting at $15.49 per month and 課咖ClassKey sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

单词树 ships an update every 2 months, 課咖ClassKey every 2 weeks. The most recent releases landed on September 27, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | 单词树 | 課咖ClassKey |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (29 ratings)](https://appshunter.io/ios/app/id1123301748/reviews)** | — |
| Number of ratings | **29** | — |
| Positive reviews | 78.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 67 MB | 151 MB |
| Requires iOS | 17 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Li Wang](https://appshunter.io/developer/788390771) | [JHUANG HONG JHIH](https://appshunter.io/developer/1874888024) |

## What reviewers say

### 单词树

[App page](https://appshunter.io/ios/app/id1123301748)

This app helps you learn English vocabulary through interactive lessons, personalized review, and progress tracking. It offers a comprehensive dictionary with translations, examples, and pronunciation, along with various testing modes to solidify your learning.

**Highlights:** Extensive vocabulary lists for various exams, Detailed word information (translation, examples, pronunciation), Real-time pronunciation recording and comparison, Customizable word lists and notes, Spaced repetition and memory curve review, Progress tracking with charts and reports, Challenging listening and testing modes

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1个月会员 | $15.49 | per month |
| 3个月会员 | $28.99 | per 3 months |
| 1年会员 | $30.99 | per year |
| 金币100个 | $5.99 | one-time |
| 金币300个 | $9.99 | one-time |
| 金币3000个 | $25.99 | one-time |


### 課咖ClassKey

[App page](https://appshunter.io/ios/app/classkey/id6759839766)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ClassKey Pro 月方案 | $3.99 | per month |
| ClassKey Pro 學期方案 | $14.99 | per 6 months |


## Frequently asked questions

### Is 单词树 free?

单词树 is free to download, with in-app purchases available.

### Is 課咖ClassKey free?

課咖ClassKey is free to download, with in-app purchases available.

### Do 单词树 or 課咖ClassKey have ads?

課咖ClassKey shows ads; 单词树 does not.

### Which is updated more often, 单词树 or 課咖ClassKey?

单词树 ships an update every 2 months, and 課咖ClassKey every 2 weeks. Most recently, 单词树 was updated on September 27, 2026 and 課咖ClassKey on September 18, 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.*