# 4000基础必备英语单词 vs Echo Loop

The clearest difference is price: Echo Loop at Free against 4000基础必备英语单词's $3.99. Echo Loop also leads on update cadence (every 5 days vs every 2 months). 4000基础必备英语单词's advantage is in-app purchases (none vs 2). On ads, device support and iOS requirement there is nothing between them.

Echo Loop is free to download; 4000基础必备英语单词 costs $3.99 up front. Echo Loop sells 2 in-app purchases, starting at $8.99 per month. 4000基础必备英语单词 asks for nothing beyond the download.

4000基础必备英语单词 ships an update every 2 months, Echo Loop every 5 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 4000基础必备英语单词 | Echo Loop |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | — | **[4.0 (11 ratings)](https://appshunter.io/ios/app/echo-loop-english-coach/id6760324074/reviews)** |
| Number of ratings | — | **11** |
| Positive reviews | — | 80.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 days** |
| Monetization | — | Free |
| Size | 938 MB | 164 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [水生 王](https://appshunter.io/developer/1587470458) | [Hangzhou Fengchen Hangqi Management Consulting Co., Ltd](https://appshunter.io/developer/1881789584) |

## What reviewers say

### 4000基础必备英语单词

[App page](https://appshunter.io/ios/app/4000/id6477503411)

**Features:** macOS Compatibility

**In-app purchases:** none


### Echo Loop

[App page](https://appshunter.io/ios/app/echo-loop-english-coach/id6760324074)

This app uses a science-based, eight-stage spaced repetition system to improve English listening and speaking skills. It guides users through blind listening, intensive listening, sentence repetition, and paragraph retelling, with AI feedback and vocabulary tools.

**Highlights:** Eight-stage spaced repetition learning, Blind and intensive listening modes, AI-assisted sentence repetition with feedback, Paragraph retelling with keyword generation, Bookmarking for sentences and vocabulary, Vocabulary flashcard review, Learning progress tracking

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Echo Loop Plus Monthly | $8.99 | per month |
| Echo Loop Plus Annual | $59.99 | per year |


## Frequently asked questions

### Is 4000基础必备英语单词 free?

4000基础必备英语单词 costs $3.99, with no in-app purchases.

### Is Echo Loop free?

Echo Loop is free to download, with in-app purchases available.

### Do 4000基础必备英语单词 or Echo Loop have ads?

Neither 4000基础必备英语单词 nor Echo Loop shows ads.

### Which is updated more often, 4000基础必备英语单词 or Echo Loop?

4000基础必备英语单词 ships an update every 2 months, and Echo Loop every 5 days. Most recently, 4000基础必备英语单词 was updated on October 30, 2026 and Echo Loop on October 31, 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.*