# CAJ Converter vs 民达OA

The clearest difference is in-app purchases: 民达OA at none against CAJ Converter's 3. 民达OA also leads on update cadence (every 2 weeks vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. CAJ Converter sells 3 in-app purchases, starting at $2.99 per month. 民达OA asks for nothing beyond the download.

CAJ Converter ships an update every 2 months, 民达OA every 2 weeks. The most recent releases landed on October 14, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | CAJ Converter | 民达OA |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 47.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Freemium | — |
| Size | 55 MB | 58 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Meitian Trading](https://appshunter.io/developer/1549616114) | [Hunan Minda Pharmaceutical Co., Ltd.](https://appshunter.io/developer/1535162701) |

## What reviewers say

### CAJ Converter

[App page](https://appshunter.io/ios/app/caj-converter/id1603045684)

Easily convert Chinese academic journal files (CAJ, NH, KDH) into PDF or Word documents. Extract text for editing or create clear PDF versions for reading and sharing.

**Highlights:** Convert CAJ to PDF, Convert CAJ to Word, Text recognition for Word conversion, Preview before PDF export, Supports .caj, .nh, .kdh formats

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

**In-app purchases (3)**

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


### 民达OA

[App page](https://appshunter.io/ios/app/oa/id1635309469)

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

**In-app purchases:** none


## Frequently asked questions

### Is CAJ Converter free?

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

### Is 民达OA free?

民达OA is free to download, with no in-app purchases.

### Do CAJ Converter or 民达OA have ads?

Neither CAJ Converter nor 民达OA shows ads.

### Which is updated more often, CAJ Converter or 民达OA?

CAJ Converter ships an update every 2 months, and 民达OA every 2 weeks. Most recently, CAJ Converter was updated on October 14, 2026 and 民达OA on October 7, 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.*