# 墨間 vs Book Light 書光光

The clearest difference is update cadence: 墨間 at every 4 days against Book Light 書光光's every 9 days. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 墨間 sells 1 one-off in-app purchase and Book Light 書光光 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

墨間 ships an update every 4 days, Book Light 書光光 every 9 days. The most recent releases landed on October 5, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | 墨間 | Book Light 書光光 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 9 days |
| Size | 62 MB | 84 MB |
| Requires iOS | **15.0** | 15.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kong NG](https://appshunter.io/developer/6806903600) | [Cheuk Yan Law](https://appshunter.io/developer/1861303384) |

## What reviewers say

### 墨間

[App page](https://appshunter.io/ios/app/id6806903598)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 墨間進階版 | $4.99 | one-time |


### Book Light 書光光

[App page](https://appshunter.io/ios/app/book-light/id6809764007)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 請我食燒賣 | $1.99 | one-time |


## Frequently asked questions

### Is 墨間 free?

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

### Is Book Light 書光光 free?

Book Light 書光光 is free to download, with in-app purchases available.

### Do 墨間 or Book Light 書光光 have ads?

Neither 墨間 nor Book Light 書光光 shows ads.

### Which is updated more often, 墨間 or Book Light 書光光?

墨間 ships an update every 4 days, and Book Light 書光光 every 9 days. Most recently, 墨間 was updated on October 5, 2026 and Book Light 書光光 on October 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.*