# 错别字识别 vs EchoRepeat

The clearest difference is in-app purchases: 错别字识别 at none against EchoRepeat's 2. 错别字识别 also leads on ads (none vs shown) and iOS requirement (12.0 vs 15.1). On price, update cadence and device support there is nothing between them.

Both are free to download. EchoRepeat sells 2 one-off in-app purchases. 错别字识别 asks for nothing beyond the download.

错别字识别 ships an update every 3 weeks, EchoRepeat every 2 weeks. The most recent releases landed on October 3, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | 错别字识别 | EchoRepeat |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Size | 42 MB | 62 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [博宇 郝](https://appshunter.io/developer/1559676145) | [Hyperlink Ltd](https://appshunter.io/developer/1895719774) |

## What reviewers say

### 错别字识别

[App page](https://appshunter.io/ios/app/id1622143170)

**In-app purchases:** none


### EchoRepeat

[App page](https://appshunter.io/ios/app/echorepeat/id6764292994)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Donation | $4.99 | one-time |
| Large Donation | $8.99 | one-time |


## Frequently asked questions

### Is 错别字识别 free?

错别字识别 is free to download, with no in-app purchases.

### Is EchoRepeat free?

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

### Do 错别字识别 or EchoRepeat have ads?

EchoRepeat shows ads; 错别字识别 does not.

### Which is updated more often, 错别字识别 or EchoRepeat?

错别字识别 ships an update every 3 weeks, and EchoRepeat every 2 weeks. Most recently, 错别字识别 was updated on October 3, 2026 and EchoRepeat on October 17, 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.*