# 서울도서관 통합전자책 뷰어 3.0 vs Leaf by Leaf

The clearest difference is update cadence: Leaf by Leaf at every 6 days against 서울도서관 통합전자책 뷰어 3.0's every 2 months. 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.

서울도서관 통합전자책 뷰어 3.0 ships an update every 2 months, Leaf by Leaf every 6 days. The most recent releases landed on October 18, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | 서울도서관 통합전자책 뷰어 3.0 | Leaf by Leaf |
| --- | --- | --- |
| 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 6 days** |
| Monetization | Free | — |
| Size | 99 MB | 118 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [(주)이씨오](https://appshunter.io/developer/371073988) | [sangwoo yang](https://appshunter.io/developer/1626444797) |

## 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


### Leaf by Leaf

[App page](https://appshunter.io/ios/app/leaf-by-leaf-reading-habit/id6785939293)

**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 Leaf by Leaf free?

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

### Do 서울도서관 통합전자책 뷰어 3.0 or Leaf by Leaf have ads?

Neither 서울도서관 통합전자책 뷰어 3.0 nor Leaf by Leaf shows ads.

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

서울도서관 통합전자책 뷰어 3.0 ships an update every 2 months, and Leaf by Leaf every 6 days. Most recently, 서울도서관 통합전자책 뷰어 3.0 was updated on October 18, 2026 and Leaf by Leaf on October 8, 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.*