# 知网cnki vs CAJ转换器

The clearest difference is in-app purchases: 知网cnki at none against CAJ转换器's 3. 知网cnki also leads on update cadence (every 3 weeks vs every 2 months). CAJ转换器's advantage is review sentiment (20% vs 0%). 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. 知网cnki asks for nothing beyond the download.

知网cnki ships an update every 3 weeks, CAJ转换器 every 2 months. The most recent releases landed on October 2, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | 知网cnki | CAJ转换器 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.3 (4 ratings)](https://appshunter.io/ios/app/cnki/id6445806100/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 0.0% of reviews | **20.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 19 MB | 15 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CGIT](https://appshunter.io/developer/1635092243) | [Beijing Chejiang Internet Technology Co., Ltd.](https://appshunter.io/developer/1680696844) |

## What reviewers say

### 知网cnki

[App page](https://appshunter.io/ios/app/cnki/id6445806100)

Access a vast collection of global academic resources, including international journals, research papers, and literature. Features include document translation, CAJ file viewing, and intelligent search to help you discover and utilize academic content.

**Highlights:** Access international journals and research papers, Document translation (PDF/Word), CAJ file viewer with original layout, Integrates millions of academic resources, Intelligent search and discovery, Supports various resource types (theses, patents, etc.)

**Features:** macOS Compatibility

**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 知网cnki free?

知网cnki 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 知网cnki or CAJ转换器 have ads?

Neither 知网cnki nor CAJ转换器 shows ads.

### Which is updated more often, 知网cnki or CAJ转换器?

知网cnki ships an update every 3 weeks, and CAJ转换器 every 2 months. Most recently, 知网cnki was updated on October 2, 2026 and CAJ转换器 on October 5, 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.*