# Calibre 2 vs Book

The clearest difference is in-app purchases: Calibre 2 at none against Book's 5. Calibre 2 also leads on iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Book sells 5 in-app purchases, starting at $4.99 per month. Calibre 2 asks for nothing beyond the download.

## The numbers

| Metric | Calibre 2 | Book |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Monetization | — | Freemium |
| Size | 2 MB | 32 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Clarence Aubessard](https://appshunter.io/developer/1857781222) | [Artem Dorozhkin](https://appshunter.io/developer/1798545981) |

## What reviewers say

### Calibre 2

[App page](https://appshunter.io/ios/app/calibre-2/id6802086061)

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

**In-app purchases:** none


### Book

[App page](https://appshunter.io/ios/app/book-epub-pdf-and-fb2-reader/id6811408221)

This app supports multiple ebook formats and comics, allowing you to read them directly from your device without conversion. It includes features for tracking reading progress, taking notes, highlighting text, and translating passages. You can also listen to text-based books aloud and set daily reading goals to build a consistent habit.

**Highlights:** Supports 9 ebook and comic formats, Reads books aloud with text-to-speech, Built-in translation for passages, Reading tracker with stats and goals, Note-taking and highlighting, Opens files from various sources

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Book Pro Monthly | $4.99 | per month |
| Book Pro Monthly | $4.99 | per month |
| Book Pro Yearly | $24.99 | per year |
| Book Pro Annual | $24.99 | per year |
| Book Pro Lifetime | $34.99 | one-time |


## Frequently asked questions

### Is Calibre 2 free?

Calibre 2 is free to download, with no in-app purchases.

### Is Book free?

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

### Do Calibre 2 or Book have ads?

Neither Calibre 2 nor Book shows ads.

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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.*