# 医教无忧教师端 vs CAJ转换器

The clearest difference is in-app purchases: 医教无忧教师端 at none against CAJ转换器's 3. CAJ转换器's advantage is iOS requirement (11.0 vs 13). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. CAJ转换器 sells 3 in-app purchases, starting at $3.99 per month. 医教无忧教师端 asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | 医教无忧教师端 | CAJ转换器 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 20.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 30 MB | 15 MB |
| Requires iOS | 13 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [上海华颐医疗科技有限公司](https://appshunter.io/developer/1446549601) | [Beijing Chejiang Internet Technology Co., Ltd.](https://appshunter.io/developer/1680696844) |

## What reviewers say

### 医教无忧教师端

[App page](https://appshunter.io/ios/app/id1457793956)

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

**In-app purchases:** none


### CAJ转换器

[App page](https://appshunter.io/ios/app/caj-caj/id6447243908)

Convert academic document formats like CAJ, NH, and KDH into clear PDF and Word files. Easily extract text, images, and tables, and convert other document types to PDF.

**Highlights:** Convert CAJ, NH, KDH to PDF and Word, Extract text, images, and tables, Convert PDF to Word, Excel, PPT, TXT, JPG, PNG, Compress and encrypt PDF files, Convert Word, Excel, PPT, TXT, images to PDF

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月会员 | $3.99 | per month |
| 年会员 | $9.99 | per year |
| 永久会员 | $14.99 | one-time |


## Frequently asked questions

### Is 医教无忧教师端 free?

医教无忧教师端 is free to download, with no in-app purchases.

### Is CAJ转换器 free?

CAJ转换器 is free to download, with in-app purchases available.

### Do 医教无忧教师端 or CAJ转换器 have ads?

Neither 医教无忧教师端 nor CAJ转换器 shows ads.

### Which is updated more often, 医教无忧教师端 or CAJ转换器?

医教无忧教师端 ships an update every 2 months, and CAJ转换器 every 2 months. Most recently, 医教无忧教师端 was updated on November 2, 2026 and CAJ转换器 on November 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.*