# udn 讀書館 vs 書紐 eXross

The clearest difference is ads: 書紐 eXross at none against udn 讀書館's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

udn 讀書館 ships an update every 6 weeks, 書紐 eXross every 5 weeks. The most recent releases landed on September 19, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | udn 讀書館 | 書紐 eXross |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.5 (8 ratings)](https://appshunter.io/ios/app/udn/id1342153816/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 5 weeks** |
| Monetization | Ad-supported | — |
| Size | 63 MB | 29 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 12+ |
| Developer | [udn.com](https://appshunter.io/developer/370132216) | [華藝數位股份有限公司, Airiti Inc.](https://appshunter.io/developer/505365472) |

## What reviewers say

### udn 讀書館

[App page](https://appshunter.io/ios/app/udn/id1342153816)

Access e-books, magazines, and newspapers from multiple libraries in one app. Enjoy a seamless reading experience with offline capabilities and customizable settings. Borrow and reserve digital content for free.

**Highlights:** Integrates multiple library lending services, Free mobile borrowing of e-books, magazines, newspapers, Offline reading of downloaded content, Supports PDF and EPUB formats, Customizable reading settings (brightness, text size, night mode), Borrow and reserve books with automatic returns

**Features:** Vision Pro support

**In-app purchases:** none


### 書紐 eXross

[App page](https://appshunter.io/ios/app/exross/id1671469907)

**In-app purchases:** none


## Frequently asked questions

### Is udn 讀書館 free?

udn 讀書館 is free to download, with no in-app purchases.

### Is 書紐 eXross free?

書紐 eXross is free to download, with no in-app purchases.

### Do udn 讀書館 or 書紐 eXross have ads?

udn 讀書館 shows ads; 書紐 eXross does not.

### Which is updated more often, udn 讀書館 or 書紐 eXross?

udn 讀書館 ships an update every 6 weeks, and 書紐 eXross every 5 weeks. Most recently, udn 讀書館 was updated on September 19, 2026 and 書紐 eXross on September 14, 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.*