# 리딩락 eBook vs 이씨오 범용뷰어

The clearest difference is update cadence: 리딩락 eBook at every 3 weeks against 이씨오 범용뷰어's every 4 months. 리딩락 eBook also leads on review sentiment (11% vs 0%) and iOS requirement (8.0 vs 13.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

리딩락 eBook ships an update every 3 weeks, 이씨오 범용뷰어 every 4 months. The most recent releases landed on August 20, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | 리딩락 eBook | 이씨오 범용뷰어 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **11.1% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 months |
| Monetization | Free | Free |
| Size | 123 MB | 54 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Y2Books](https://appshunter.io/developer/509026803) | [(주)이씨오](https://appshunter.io/developer/371073988) |

## What reviewers say

### 리딩락 eBook

[App page](https://appshunter.io/ios/app/ebook/id1059616611)

Access and read a wide selection of best-selling and new eBooks anytime, anywhere. This app allows you to customize your reading experience with adjustable brightness, font, and text size. Organize your favorite books into personalized shelves and enjoy reading on up to five devices.

**Highlights:** Access best-selling and new eBooks, Read on smartphones, tablets, and PCs, Adjustable screen brightness, font, and text size, Add personal files for reading, Create custom bookshelves and secret libraries, Simultaneous reading on up to 5 devices

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

**In-app purchases:** none


### 이씨오 범용뷰어

[App page](https://appshunter.io/ios/app/id1495570610)

This application allows users to read electronic books (eBooks) managed by (주)이씨오. Users can download and access their eBooks from their virtual bookshelf anytime, anywhere. It's also used to re-read borrowed books.

**Highlights:** Read eBooks, Download eBooks, Access virtual bookshelf, Re-read borrowed books

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

**In-app purchases:** none


## Frequently asked questions

### Is 리딩락 eBook free?

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

### Is 이씨오 범용뷰어 free?

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

### Do 리딩락 eBook or 이씨오 범용뷰어 have ads?

Neither 리딩락 eBook nor 이씨오 범용뷰어 shows ads.

### Which is updated more often, 리딩락 eBook or 이씨오 범용뷰어?

리딩락 eBook ships an update every 3 weeks, and 이씨오 범용뷰어 every 4 months. Most recently, 리딩락 eBook was updated on August 20, 2026 and 이씨오 범용뷰어 on September 21, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*