# Book Library by DACCAA vs Penguin

The clearest difference is in-app purchases: Book Library by DACCAA at none against Penguin's 1. Penguin's advantage is update cadence (every 3 days vs every 5 months). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. Penguin sells 1 one-off in-app purchase. Book Library by DACCAA asks for nothing beyond the download.

Book Library by DACCAA ships an update every 5 months, Penguin every 3 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Book Library by DACCAA | Penguin |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (2 ratings)](https://appshunter.io/ios/app/penguin-cbz-cbr-comic-reader/id6780071705/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 4 MB | 121 MB |
| Requires iOS | 18 | 18.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 12+ | 4+ |
| Developer | [DACCAA](https://appshunter.io/developer/1219434855) | [HAEDUN KIM](https://appshunter.io/developer/1896506869) |

## What reviewers say

### Book Library by DACCAA

[App page](https://appshunter.io/ios/app/book-library-by-daccaa/id1577779720)

Organize your physical book collection, track reading progress, and maintain reading streaks. This app works offline and can sync with iCloud, automatically fetching book details from online databases.

**Highlights:** Physical book collection tracking, Reading progress monitoring, Reading streak maintenance, Offline functionality, iCloud sync, Autofill book information

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

**In-app purchases:** none


### Penguin

[App page](https://appshunter.io/ios/app/penguin-cbz-cbr-comic-reader/id6780071705)

This app allows you to read your own comic collection in various formats, with on-device translation for Japanese manga. It offers a customizable reading experience and a smart bookshelf, all while prioritizing user privacy and local data processing.

**Highlights:** On-device manga translation for Japanese comics, Supports various file formats (CBZ, CBR, PDF, etc.), SMB and WebDAV network drive support, OPDS catalog compatibility, Smart bookshelf with automatic categorization, Customizable reading gestures and scrolling

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Lifetime — Buy Once | $3.99 | one-time |


## Frequently asked questions

### Is Book Library by DACCAA free?

Book Library by DACCAA is free to download, with no in-app purchases.

### Is Penguin free?

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

### Do Book Library by DACCAA or Penguin have ads?

Neither Book Library by DACCAA nor Penguin shows ads.

### Which is updated more often, Book Library by DACCAA or Penguin?

Book Library by DACCAA ships an update every 5 months, and Penguin every 3 days. Most recently, Book Library by DACCAA was updated on October 24, 2026 and Penguin on October 25, 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.*