# AI背单词 vs Echo Loop

The clearest difference is update cadence: Echo Loop at every 4 days against AI背单词's every 6 months. Echo Loop also leads on iOS requirement (15.0 vs 18.5). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

AI背单词 ships an update every 6 months, Echo Loop every 4 days. The most recent releases landed on October 1, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | AI背单词 | Echo Loop |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.1 (8 ratings)](https://appshunter.io/ios/app/echo-loop-english-coach/id6760324074/reviews)** |
| Number of ratings | — | **8** |
| Positive reviews | — | 80.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 4 days** |
| Monetization | — | Free |
| Size | 6 MB | 164 MB |
| Requires iOS | 18.5 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [伟 付](https://appshunter.io/developer/1804140914) | [Hangzhou Fengchen Hangqi Management Consulting Co., Ltd](https://appshunter.io/developer/1881789584) |

## What reviewers say

### AI背单词

[App page](https://appshunter.io/ios/app/ai/id6748568205)

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

**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:** none


## Frequently asked questions

### Is AI背单词 free?

AI背单词 is free to download, with no in-app purchases.

### Is Echo Loop free?

Echo Loop is free to download, with no in-app purchases.

### Do AI背单词 or Echo Loop have ads?

Neither AI背单词 nor Echo Loop shows ads.

### Which is updated more often, AI背单词 or Echo Loop?

AI背单词 ships an update every 6 months, and Echo Loop every 4 days. Most recently, AI背单词 was updated on October 1, 2026 and Echo Loop on October 9, 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.*