# 리딩락 eBook vs 시오리

The clearest difference is review sentiment: 시오리 at 100% against 리딩락 eBook's 11%. 시오리 also leads on update cadence (every 3 days vs every 3 weeks). 리딩락 eBook's advantage is in-app purchases (none vs 10) and iOS requirement (8.0 vs 17.3). On price, ads and device support there is nothing between them.

Both are free to download. 시오리 sells 10 one-off in-app purchases. 리딩락 eBook asks for nothing beyond the download.

리딩락 eBook ships an update every 3 weeks, 시오리 every 3 days. The most recent releases landed on October 21, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | 리딩락 eBook | 시오리 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 11.1% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | **Free** | Freemium |
| Size | 123 MB | 149 MB |
| Requires iOS | **8.0** | 17.3 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Y2Books](https://appshunter.io/developer/509026803) | [ohttne](https://appshunter.io/developer/6788399225) |

## 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


### 시오리

[App page](https://appshunter.io/ios/app/and/id6788732084)

Record your reading progress, favorite quotes, and notes for each book. Create a personal reading feed with features like a sentence scanner, character relationship maps, and a focus timer.  Sync your reading data across devices.

**Highlights:** Organize books by status (reading, finished, want to read), Record quotes, notes, photos, and sticky notes per book, Scan book sentences into text, Create sentence collages with photos, Map character relationships, Track reading habits with logs and timers, Save unfamiliar words to a vocabulary list

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 포근 메모지 테마 | $0.99 | one-time |
| 과일 메모지 테마 | $0.99 | one-time |
| 반짝 메모지 테마 | $0.99 | one-time |
| 도트 메모지 테마 | $0.99 | one-time |
| 도트2 메모지 테마 | $0.99 | one-time |
| 프레임 메모지 테마 | $0.99 | one-time |
| 그라데이션 메모지 테마 | $0.99 | one-time |
| 모양 메모지 테마 | $0.99 | one-time |
| 뽀얀 메모지 테마 | $0.99 | one-time |
| 뮤트 메모지 테마 | $0.99 | one-time |


## Frequently asked questions

### Is 리딩락 eBook free?

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

### Is 시오리 free?

시오리 is free to download, with in-app purchases available.

### Do 리딩락 eBook or 시오리 have ads?

Neither 리딩락 eBook nor 시오리 shows ads.

### Which is updated more often, 리딩락 eBook or 시오리?

리딩락 eBook ships an update every 3 weeks, and 시오리 every 3 days. Most recently, 리딩락 eBook was updated on October 21, 2026 and 시오리 on October 28, 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.*