# 考研英语核心单词背诵HD vs 欢乐成语

The clearest difference is in-app purchases: 欢乐成语 at none against 考研英语核心单词背诵HD's 1. 欢乐成语 also leads on update cadence (weekly vs every 4 weeks). 考研英语核心单词背诵HD's advantage is ads (none vs shown) and iOS requirement (11.0 vs 13.0). On price and device support there is nothing between them.

Both are free to download. 考研英语核心单词背诵HD sells 1 one-off in-app purchase. 欢乐成语 asks for nothing beyond the download.

考研英语核心单词背诵HD ships an update every 4 weeks, 欢乐成语 weekly. The most recent releases landed on October 18, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | 考研英语核心单词背诵HD | 欢乐成语 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 57.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 4 weeks | **Weekly** |
| Monetization | Free | — |
| Size | 103 MB | 16 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [怡怡 沈](https://appshunter.io/developer/582667064) | [Commander Velan](https://appshunter.io/developer/1446831106) |

## What reviewers say

### 考研英语核心单词背诵HD

[App page](https://appshunter.io/ios/app/hd/id616665233)

This app uses the Ebbinghaus forgetting curve theory and a smart memory engine to help users memorize English vocabulary for postgraduate entrance exams. It offers offline access, detailed word explanations, and intelligent task management for efficient long-term memory.

**Highlights:** Ebbinghaus forgetting curve theory, Smart memory engine, Offline access, Detailed word explanations, Intelligent task management, Vocabulary collection and error tracking

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| YY背单词考研汇完整版 | $2.99 | one-time |


### 欢乐成语

[App page](https://appshunter.io/ios/app/id1629672666)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 考研英语核心单词背诵HD free?

考研英语核心单词背诵HD is free to download, with in-app purchases available.

### Is 欢乐成语 free?

欢乐成语 is free to download, with no in-app purchases.

### Do 考研英语核心单词背诵HD or 欢乐成语 have ads?

欢乐成语 shows ads; 考研英语核心单词背诵HD does not.

### Which is updated more often, 考研英语核心单词背诵HD or 欢乐成语?

考研英语核心单词背诵HD ships an update every 4 weeks, and 欢乐成语 weekly. Most recently, 考研英语核心单词背诵HD was updated on October 18, 2026 and 欢乐成语 on October 3, 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.*