# 책도둑 vs 시오리

The clearest difference is update cadence: 시오리 at every 3 days against 책도둑's every 3 weeks. 시오리 also leads on review sentiment (100% vs 86%). 책도둑's advantage is iOS requirement (15.6 vs 17.3). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. 책도둑 sells 3 one-off in-app purchases and 시오리 sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

책도둑 ships an update every 3 weeks, 시오리 every 3 days. Both last shipped on October 28, 2026.

## The numbers

| Metric | 책도둑 | 시오리 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 85.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 105 MB | 149 MB |
| Requires iOS | **15.6** | 17.3 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [deonaeunnaeil Co., Ltd.](https://appshunter.io/developer/1802379839) | [ohttne](https://appshunter.io/developer/6788399225) |

## What reviewers say

### 책도둑

[App page](https://appshunter.io/ios/app/id6743348085)

Access a vast library of world classics and Korean short literature with modern translations. Enjoy an immersive reading experience with background music and manage your reading list. New books are continuously added, including hard-to-find titles.

**Highlights:** Extensive library of world classics, Modern, easy-to-read translations, Continuously updated with new titles, Personalized reading lists, Customizable background music for reading, Access to out-of-print books

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 책도둑 티켓 (3일) | $0.49 | one-time |
| 책도둑 티켓 (1년) | $5.99 | one-time |
| 책도둑 티켓 | $11.99 | one-time |


### 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 책도둑 free?

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

### Is 시오리 free?

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

### Do 책도둑 or 시오리 have ads?

Neither 책도둑 nor 시오리 shows ads.

### Which is updated more often, 책도둑 or 시오리?

책도둑 ships an update every 3 weeks, and 시오리 every 3 days. Most recently, 책도둑 was updated on October 28, 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.*