# 謀殺天后密室 vs ReadGrow

The clearest difference is update cadence: ReadGrow at every 4 days against 謀殺天后密室's every 6 weeks. 謀殺天后密室's advantage is device support (3 vs 1) and iOS requirement (14.0 vs 16.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. 謀殺天后密室 sells 2 one-off in-app purchases and ReadGrow sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

謀殺天后密室 ships an update every 6 weeks, ReadGrow every 4 days. The most recent releases landed on October 27, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 謀殺天后密室 | ReadGrow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 4 days** |
| Size | 48 MB | 17 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [遠流出版公司](https://appshunter.io/developer/393798496) | [Chih-Yen Kuo](https://appshunter.io/developer/6783488735) |

## 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 |


### ReadGrow

[App page](https://appshunter.io/ios/app/readgrow/id6783488733)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Aged Pu-erh | $5.99 | one-time |


## 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 ReadGrow free?

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

### Do 謀殺天后密室 or ReadGrow have ads?

Neither 謀殺天后密室 nor ReadGrow shows ads.

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

謀殺天后密室 ships an update every 6 weeks, and ReadGrow every 4 days. Most recently, 謀殺天后密室 was updated on October 27, 2026 and ReadGrow on October 31, 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.*