# eEPUB vs 書房

The clearest difference is update cadence: 書房 at every 3 days against eEPUB's every 2 months. eEPUB's advantage is iOS requirement (15.0 vs 17.0). 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.

eEPUB ships an update every 2 months, 書房 every 3 days. The most recent releases landed on October 10, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | eEPUB | 書房 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Size | 3 MB | 9 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Keisuke Kudo](https://appshunter.io/developer/1782903478) | [ZEYAN LIN](https://appshunter.io/developer/6785373009) |

## What reviewers say

### eEPUB

[App page](https://appshunter.io/ios/app/eepub/id6772682298)

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

**In-app purchases:** none


### 書房

[App page](https://appshunter.io/ios/app/id6798525550)

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

**In-app purchases:** none


## Frequently asked questions

### Is eEPUB free?

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

### Is 書房 free?

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

### Do eEPUB or 書房 have ads?

Neither eEPUB nor 書房 shows ads.

### Which is updated more often, eEPUB or 書房?

eEPUB ships an update every 2 months, and 書房 every 3 days. Most recently, eEPUB was updated on October 10, 2026 and 書房 on October 13, 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.*