# 사락 vs 서울도서관 통합전자책 뷰어 3.0

The clearest difference is rating: 사락 at 4.0 against 서울도서관 통합전자책 뷰어 3.0's 1.0. 사락 also leads on review sentiment (45% vs 22%). 서울도서관 통합전자책 뷰어 3.0's advantage is monetization model (free vs ad-supported). On price, ratings volume, update cadence and ads there is nothing between them.

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

사락 holds the better App Store score, 4.0 against 1.0. Both are backed by a comparable volume of ratings — 3 and 3 respectively. Written reviews point the same way: 45% of 사락's written reviews are positive against 22% of 서울도서관 통합전자책 뷰어 3.0's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 11, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | 사락 | 서울도서관 통합전자책 뷰어 3.0 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (3 ratings)](https://appshunter.io/ios/app/24/id6447539223/reviews)** | [1.0 (3 ratings)](https://appshunter.io/ios/app/30/id6743486883/reviews) |
| Number of ratings | 3 | 3 |
| Positive reviews | **45.5% of reviews** | 21.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Ad-supported | **Free** |
| Size | 69 MB | 99 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [예스24](https://appshunter.io/developer/360051539) | [(주)이씨오](https://appshunter.io/developer/371073988) |

## What reviewers say

### 사락

[App page](https://appshunter.io/ios/app/24/id6447539223)

Create a personalized reading journal, connect with fellow book lovers, and discover new titles. Track your reading progress, share reviews, and join or create book clubs. Earn rewards for your engagement.

**Highlights:** Personalized reading journal, Book review sharing, Book club participation and creation, Reading progress tracking, Content recommendations, Photo-based note-taking

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is 사락 free?

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

### Is 서울도서관 통합전자책 뷰어 3.0 free?

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

### Which has better reviews, 사락 or 서울도서관 통합전자책 뷰어 3.0?

사락 is rated higher. 사락 averages 4.0 out of 5 from 3 ratings, while 서울도서관 통합전자책 뷰어 3.0 averages 1.0 from 3 ratings.

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

Neither 사락 nor 서울도서관 통합전자책 뷰어 3.0 shows ads.

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

사락 ships an update every 2 months, and 서울도서관 통합전자책 뷰어 3.0 every 2 months. Most recently, 사락 was updated on October 11, 2026 and 서울도서관 통합전자책 뷰어 3.0 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.*