# 謀殺天后密室 vs 書紐 eXross

The clearest difference is in-app purchases: 書紐 eXross at none against 謀殺天后密室's 2. 謀殺天后密室's advantage is iOS requirement (14.0 vs 16.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 謀殺天后密室 sells 2 one-off in-app purchases. 書紐 eXross asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 6 weeks. The most recent releases landed on October 4, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 謀殺天后密室 | 書紐 eXross |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/exross/id1671469907/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | Every 6 weeks |
| Monetization | — | Free |
| Size | 48 MB | 23 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 12+ |
| Developer | [遠流出版公司](https://appshunter.io/developer/393798496) | [華藝數位股份有限公司, Airiti Inc.](https://appshunter.io/developer/505365472) |

## What reviewers say

### 謀殺天后密室

[App page](https://appshunter.io/ios/app/id1660841607)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 東方快車謀殺案 | $8.99 | one-time |
| 羅傑艾克洛命案 | $8.99 | one-time |


### 書紐 eXross

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

This app consolidates your digital book purchases from various online bookstores into a single, unified e-reader. Enjoy a seamless reading experience with features like easy book searching, customizable reading modes, and offline access.

**Highlights:** Consolidate eBooks from multiple bookstores, Unified digital bookshelf, Easy book searching and filtering, Customizable reading modes, Online and offline reading options, Continue reading from last session

**In-app purchases:** none


## Frequently asked questions

### Is 謀殺天后密室 free?

謀殺天后密室 is free to download, with in-app purchases available.

### Is 書紐 eXross free?

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

### Do 謀殺天后密室 or 書紐 eXross have ads?

Neither 謀殺天后密室 nor 書紐 eXross shows ads.

### Which is updated more often, 謀殺天后密室 or 書紐 eXross?

謀殺天后密室 ships an update every 6 weeks, and 書紐 eXross every 6 weeks. Most recently, 謀殺天后密室 was updated on October 4, 2026 and 書紐 eXross on October 24, 2026.

---

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