# 错别字识别 vs 公文写作

The clearest difference is in-app purchases: 错别字识别 at none against 公文写作's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 公文写作 sells 3 in-app purchases, starting at $3.99 per month. 错别字识别 asks for nothing beyond the download.

错别字识别 ships an update every 3 weeks, 公文写作 monthly. The most recent releases landed on September 17, 2026 and May 18, 2026 respectively.

## The numbers

| Metric | 错别字识别 | 公文写作 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Size | 42 MB | 6 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [博宇 郝](https://appshunter.io/developer/1559676145) | [Beijing Chejiang Internet Technology Co., Ltd.](https://appshunter.io/developer/1680696844) |

## What reviewers say

### 错别字识别

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

**In-app purchases:** none


### 公文写作

[App page](https://appshunter.io/ios/app/id6449450047)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月会员 | $3.99 | per month |
| 年会员 | $14.99 | per year |
| 永久会员 | $19.99 | 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 公文写作 free?

公文写作 is free to download, with in-app purchases available.

### Do 错别字识别 or 公文写作 have ads?

Neither 错别字识别 nor 公文写作 shows ads.

### Which is updated more often, 错别字识别 or 公文写作?

错别字识别 ships an update every 3 weeks, and 公文写作 monthly. Most recently, 错别字识别 was updated on September 17, 2026 and 公文写作 on May 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.*