# 서울도서관 통합전자책 뷰어 3.0 vs 고요

The clearest difference is update cadence: 고요 at every 4 weeks against 서울도서관 통합전자책 뷰어 3.0's every 2 months. 서울도서관 통합전자책 뷰어 3.0's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

서울도서관 통합전자책 뷰어 3.0 ships an update every 2 months, 고요 every 4 weeks. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 서울도서관 통합전자책 뷰어 3.0 | 고요 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (3 ratings)](https://appshunter.io/ios/app/30/id6743486883/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 21.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 weeks** |
| Monetization | Free | — |
| Size | 99 MB | 156 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [(주)이씨오](https://appshunter.io/developer/371073988) | [Minseo Ko](https://appshunter.io/developer/6805713431) |

## What reviewers say

### 서울도서관 통합전자책 뷰어 3.0

[App page](https://appshunter.io/ios/app/30/id6743486883)

This application allows users to read eBooks borrowed from the Seoul Library. Download and access your borrowed books anytime, anywhere through the app's bookshelf. New books must be borrowed from the Seoul Library's eBook website before they can be read.

**Highlights:** Read Seoul Library eBooks, Download books to device, Access borrowed books, Offline reading, User bookshelf

**In-app purchases:** none


### 고요

[App page](https://appshunter.io/ios/app/id6808721422)

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

**In-app purchases:** none


## Frequently asked questions

### Is 서울도서관 통합전자책 뷰어 3.0 free?

서울도서관 통합전자책 뷰어 3.0 is free to download, with no in-app purchases.

### Is 고요 free?

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

### Do 서울도서관 통합전자책 뷰어 3.0 or 고요 have ads?

Neither 서울도서관 통합전자책 뷰어 3.0 nor 고요 shows ads.

### Which is updated more often, 서울도서관 통합전자책 뷰어 3.0 or 고요?

서울도서관 통합전자책 뷰어 3.0 ships an update every 2 months, and 고요 every 4 weeks. Most recently, 서울도서관 통합전자책 뷰어 3.0 was updated on October 30, 2026 and 고요 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.*