# CAJ转换器 vs 虚拟教研室新版

The clearest difference is in-app purchases: 虚拟教研室新版 at none against CAJ转换器's 3. 虚拟教研室新版 also leads on update cadence (weekly vs every 2 months). On price, ads, device support and iOS requirement 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. 虚拟教研室新版 asks for nothing beyond the download.

CAJ转换器 ships an update every 2 months, 虚拟教研室新版 weekly. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | CAJ转换器 | 虚拟教研室新版 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 15 MB | 274 MB |
| Requires iOS | **11.0** | 12.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Beijing Chejiang Internet Technology Co., Ltd.](https://appshunter.io/developer/1680696844) | [北京中教仪科技有限公司](https://appshunter.io/developer/1639536743) |

## What reviewers say

### 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 |


### 虚拟教研室新版

[App page](https://appshunter.io/ios/app/id6578445930)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CAJ转换器 free?

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

### Is 虚拟教研室新版 free?

虚拟教研室新版 is free to download, with no in-app purchases.

### Do CAJ转换器 or 虚拟教研室新版 have ads?

Neither CAJ转换器 nor 虚拟教研室新版 shows ads.

### Which is updated more often, CAJ转换器 or 虚拟教研室新版?

CAJ转换器 ships an update every 2 months, and 虚拟教研室新版 weekly. Most recently, CAJ转换器 was updated on November 3, 2026 and 虚拟教研室新版 on October 30, 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.*