# 책도둑 vs 책인아웃

The clearest difference is in-app purchases: 책인아웃 at none against 책도둑's 3. 책인아웃 also leads on update cadence (every 9 days vs every 3 weeks) and review sentiment (94% vs 86%). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 책도둑 sells 3 one-off in-app purchases. 책인아웃 asks for nothing beyond the download.

책도둑 ships an update every 3 weeks, 책인아웃 every 9 days. The most recent releases landed on September 22, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | 책도둑 | 책인아웃 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/id6797207682/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | 85.7% of reviews | **94.1% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 101 MB | 47 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [deonaeunnaeil Co., Ltd.](https://appshunter.io/developer/1802379839) | [Hail Moon](https://appshunter.io/developer/6797207684) |

## 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 |


### 책인아웃

[App page](https://appshunter.io/ios/app/id6797207682)

This app lets you organize your reading, track your progress, and connect with other book lovers. Create a virtual bookshelf, earn photo cards for finished books, and set reading goals. Discover new books with personalized recommendations and join discussions in the community.

**Highlights:** Virtual bookshelf organization, Reading progress tracking, Book completion photo cards, Reading goals and challenges, Book community discussions, Personalized book recommendations, Import reading records via CSV

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

**In-app purchases:** none


## Frequently asked questions

### Is 책도둑 free?

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

### Is 책인아웃 free?

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

### Do 책도둑 or 책인아웃 have ads?

Neither 책도둑 nor 책인아웃 shows ads.

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

책도둑 ships an update every 3 weeks, and 책인아웃 every 9 days. Most recently, 책도둑 was updated on September 22, 2026 and 책인아웃 on September 23, 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.*