# 博客來電子書 vs POSU

The clearest difference is update cadence: 博客來電子書 at every 3 weeks against POSU's every 21 months. POSU's advantage is iOS requirement (13.4 vs 15.0). On price, ads, 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.

博客來電子書 ships an update every 3 weeks, POSU every 21 months. The most recent releases landed on October 23, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | 博客來電子書 | POSU |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (760 ratings)](https://appshunter.io/ios/app/id1090804883/reviews)** | — |
| Number of ratings | **760** | — |
| Positive reviews | 9.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 21 months |
| Size | 167 MB | 3 MB |
| Requires iOS | 15.0 | **13.4** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [博客來網路書店](https://appshunter.io/developer/380598198) | [Hsu Bering](https://appshunter.io/developer/1469006942) |

## What reviewers say

### 博客來電子書

[App page](https://appshunter.io/ios/app/id1090804883)

**In-app purchases:** none

**What reviewers like**

- 🔥 Works great!
- 💻 Supports audiobooks
- 📚 Extensive book selection

**What reviewers complain about**

- 🐛 Frequent crashes
- 📵 Requires internet for offline reading
- 🔍 Difficult to find books
- 🖥️ Poor iPad app design
- 🔒 Unable to delete ebooks

**Reported bugs**

- Frequent app crashes
- Unable to download purchased books
- Login issues on various devices
- Deleted reading progress and notes
- Incompatibility with newer devices/OS

**Requested features**

- Add horizontal/vertical reading modes
- Implement offline reading support
- Improve book discovery and browsing
- Introduce note-taking and highlighting
- Enhance iPad app experience


### POSU

[App page](https://appshunter.io/ios/app/posu/id1642876556)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 博客來電子書 free?

博客來電子書 is free to download, with no in-app purchases.

### Is POSU free?

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

### Do 博客來電子書 or POSU have ads?

Neither 博客來電子書 nor POSU shows ads.

### Which is updated more often, 博客來電子書 or POSU?

博客來電子書 ships an update every 3 weeks, and POSU every 21 months. Most recently, 博客來電子書 was updated on October 23, 2026 and POSU on October 14, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*