# CAJ文献阅读器 vs CAJ转换器

The clearest difference is update cadence: CAJ转换器 at every 2 months against CAJ文献阅读器's every 4 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. CAJ文献阅读器 sells 3 in-app purchases, starting at $2.99 per month and CAJ转换器 sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

CAJ文献阅读器 ships an update every 4 months, CAJ转换器 every 2 months. The most recent releases landed on September 16, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | CAJ文献阅读器 | CAJ转换器 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 65.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Freemium | — |
| Size | 53 MB | 15 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Meitian Trading](https://appshunter.io/developer/1549616114) | [Beijing Chejiang Internet Technology Co., Ltd.](https://appshunter.io/developer/1680696844) |

## What reviewers say

### CAJ文献阅读器

[App page](https://appshunter.io/ios/app/caj/id1669879414)

This app allows you to easily read and convert CAJ, NH, and KDH document formats, commonly used for academic papers from Chinese academic databases. It supports converting these files to PDF or Word, with OCR capabilities for text extraction from scanned images. You can also import files from messaging apps and manage your reading history.

**Highlights:** Read CAJ, NH, KDH formats, Convert CAJ to PDF, Convert CAJ to Word, OCR text recognition, Import from messaging apps, Reading history management

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月会员 | $2.99 | per month |
| 季会员 | $4.99 | per 3 months |
| 年会员 | $7.99 | per year |


### CAJ转换器

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

**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 CAJ文献阅读器 free?

CAJ文献阅读器 is free to download, with in-app purchases available.

### Is CAJ转换器 free?

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

### Do CAJ文献阅读器 or CAJ转换器 have ads?

Neither CAJ文献阅读器 nor CAJ转换器 shows ads.

### Which is updated more often, CAJ文献阅读器 or CAJ转换器?

CAJ文献阅读器 ships an update every 4 months, and CAJ转换器 every 2 months. Most recently, CAJ文献阅读器 was updated on September 16, 2026 and CAJ转换器 on September 22, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*