# udn 讀書館 vs mooSound 犢出聲

The clearest difference is review sentiment: mooSound 犢出聲 at 100% against udn 讀書館's 50%. mooSound 犢出聲 also leads on rating (4.8 vs 2.5) and ads (none vs shown). On price, ratings volume, update cadence and in-app purchases there is nothing between them.

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

mooSound 犢出聲 holds the better App Store score, 4.8 against 2.5. Both are backed by a comparable volume of ratings — 8 and 16 respectively. Written reviews point the same way: 50% of udn 讀書館's written reviews are positive against 100% of mooSound 犢出聲's.

udn 讀書館 ships an update every 6 weeks, mooSound 犢出聲 monthly. The most recent releases landed on September 19, 2026 and August 12, 2026 respectively.

## The numbers

| Metric | udn 讀書館 | mooSound 犢出聲 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (8 ratings)](https://appshunter.io/ios/app/udn/id1342153816/reviews) | **[4.8 (16 ratings)](https://appshunter.io/ios/app/moosound/id1630868483/reviews)** |
| Number of ratings | 8 | **16** |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Monthly** |
| Monetization | Ad-supported | **Free** |
| Size | 63 MB | 82 MB |
| Requires iOS | 16.0 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 12+ |
| Developer | [udn.com](https://appshunter.io/developer/370132216) | [eCrowdmedia](https://appshunter.io/developer/942389747) |

## 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


### mooSound 犢出聲

[App page](https://appshunter.io/ios/app/moosound/id1630868483)

Listen to audiobooks hands-free and utilize your spare time. This app offers customizable playback options like speed, skip intervals, and download settings. It also includes bookmarking and a driving mode with large buttons.

**Highlights:** On-demand playback, Customizable download settings, Adjustable playback speed, Customizable skip intervals, Bookmark functionality, Driving mode with large buttons

**Features:** Siri integration

**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 mooSound 犢出聲 free?

mooSound 犢出聲 is free to download, with no in-app purchases.

### Which has better reviews, udn 讀書館 or mooSound 犢出聲?

mooSound 犢出聲 is rated higher. udn 讀書館 averages 2.5 out of 5 from 8 ratings, while mooSound 犢出聲 averages 4.8 from 16 ratings.

### Do udn 讀書館 or mooSound 犢出聲 have ads?

udn 讀書館 shows ads; mooSound 犢出聲 does not.

### Which is updated more often, udn 讀書館 or mooSound 犢出聲?

udn 讀書館 ships an update every 6 weeks, and mooSound 犢出聲 monthly. Most recently, udn 讀書館 was updated on September 19, 2026 and mooSound 犢出聲 on August 12, 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.*