# ivySCI vs CAJ阅读器

The clearest difference is review sentiment: ivySCI at 80% against CAJ阅读器's 0%. ivySCI also leads on rating (4.6 vs 4.3). CAJ阅读器's advantage is iOS requirement (11.0 vs 15.5). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. ivySCI sells 3 in-app purchases, starting at $2.99 per month and CAJ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 holds the better App Store score, 4.6 against 4.3. Both are backed by a comparable volume of ratings — 9 and 11 respectively. Written reviews point the same way: 80% of ivySCI's written reviews are positive against 0% of CAJ阅读器's.

ivySCI ships an update fortnightly, CAJ阅读器 every 11 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | ivySCI | CAJ阅读器 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (9 ratings)](https://appshunter.io/ios/app/ivysci/id1600901406/reviews)** | [4.3 (11 ratings)](https://appshunter.io/ios/app/caj-caj/id6447676025/reviews) |
| Number of ratings | 9 | **11** |
| Positive reviews | **80.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 11 days** |
| Monetization | Freemium | Freemium |
| Size | 66 MB | 45 MB |
| Requires iOS | 15.5 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nanjing IvyScience Information Technology Co., Ltd.](https://appshunter.io/developer/1600901408) | [Light Speed Intelligence Technology Co., Ltd.](https://appshunter.io/developer/1670291399) |

## 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阅读器

[App page](https://appshunter.io/ios/app/caj-caj/id6447676025)

This app is a professional reader for CAJ documents, supporting academic papers, journals, and magazines. It also offers conversion tools to transform CAJ files into Word or PDF, and handles various PDF format conversions with other office documents.

**Highlights:** CAJ document viewing, CAJ to Word conversion, CAJ to PDF conversion, PDF to Office file conversion, Supports academic papers and journals

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月会员 | $2.99 | per month |
| 年会员 | $12.99 | per year |
| 永久会员 | $14.99 | one-time |


## Frequently asked questions

### Is ivySCI free?

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

### Is CAJ阅读器 free?

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

### Which has better reviews, ivySCI or CAJ阅读器?

ivySCI is rated higher. ivySCI averages 4.6 out of 5 from 9 ratings, while CAJ阅读器 averages 4.3 from 11 ratings.

### Do ivySCI or CAJ阅读器 have ads?

Neither ivySCI nor CAJ阅读器 shows ads.

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

ivySCI ships an update fortnightly, and CAJ阅读器 every 11 days. Most recently, ivySCI was updated on October 24, 2026 and CAJ阅读器 on October 24, 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.*