# ivySCI vs CAJ文献阅读器

The clearest difference is update cadence: ivySCI at fortnightly against CAJ文献阅读器's every 4 months. ivySCI also leads on review sentiment (80% vs 65%). CAJ文献阅读器's advantage is iOS requirement (12.0 vs 15.5). On price, ads, in-app purchases and monetization model there is nothing between them.

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

ivySCI ships an update fortnightly, CAJ文献阅读器 every 4 months. The most recent releases landed on September 28, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | ivySCI | CAJ文献阅读器 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (9 ratings)](https://appshunter.io/ios/app/ivysci/id1600901406/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | **80.0% of reviews** | 65.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 4 months |
| Monetization | Freemium | Freemium |
| Size | 66 MB | 53 MB |
| Requires iOS | 15.5 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nanjing IvyScience Information Technology Co., Ltd.](https://appshunter.io/developer/1600901408) | [Meitian Trading](https://appshunter.io/developer/1549616114) |

## What reviewers say

### ivySCI

[App page](https://appshunter.io/ios/app/ivysci/id1600901406)

This app helps researchers manage and read scientific papers efficiently. It automatically extracts metadata, offers AI-assisted reading and proofreading, and allows for easy note-taking and citation integration with word processors.

**Highlights:** Automatic PDF metadata identification, AI-assisted reading and Q&A, Built-in translation and dictionary, Reference extraction and download, Image extraction and side-by-side viewing, Cloud-synced notes across devices, Word processor citation plugin

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ivySCI VIP Monthly Service | $2.99 | per month |
| Annual VIP Subscription | $29.99 | per year |
| Annual AI Pro Subscription | $39.99 | per year |


### 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 |


## Frequently asked questions

### Is ivySCI free?

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

### Is CAJ文献阅读器 free?

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

### Do ivySCI or CAJ文献阅读器 have ads?

Neither ivySCI nor CAJ文献阅读器 shows ads.

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

ivySCI ships an update fortnightly, and CAJ文献阅读器 every 4 months. Most recently, ivySCI was updated on September 28, 2026 and CAJ文献阅读器 on September 16, 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.*