# Calibre ebook reader vs GemReader

The clearest difference is in-app purchases: GemReader at none against Calibre ebook reader's 4. GemReader also leads on ads (none vs shown) and rating (5.0 vs 4.6). Calibre ebook reader's advantage is ratings volume (19 vs 1). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Calibre ebook reader sells 4 in-app purchases, starting at $4.99 per month. GemReader asks for nothing beyond the download.

GemReader holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Calibre ebook reader has 19 ratings behind it against 1, so its average is the more settled of the two.

Calibre ebook reader ships an update every 9 days, GemReader every 2 days. The most recent releases landed on November 9, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | Calibre ebook reader | GemReader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (19 ratings)](https://appshunter.io/ios/app/calibre-ebook-reader-pageo/id6759336810/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/gemreader-ebook-study-reader/id6814832827/reviews)** |
| Number of ratings | **19** | 1 |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 9 days | **Every 2 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 88 MB | 87 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [VISIONCRAFT, SOCIEDAD LIMITADA](https://appshunter.io/developer/1473558735) | [Johan Christopher Nohall](https://appshunter.io/developer/6814832829) |

## What reviewers say

### Calibre ebook reader

[App page](https://appshunter.io/ios/app/calibre-ebook-reader-pageo/id6759336810)

Seamlessly sync your Calibre ebook library wirelessly to your iPhone. Convert various ebook formats to EPUB directly within the app and customize your reading experience with adjustable fonts, themes, and spacing. Listen to your books with text-to-speech functionality.

**Highlights:** Wireless Calibre library sync, Built-in ebook converter (PDF, MOBI, AZW, etc. to EPUB), Customizable reading experience (fonts, themes), Text-to-speech audiobook functionality, Import from cloud storage (Files, Dropbox, iCloud), Organize library by author, series, collection

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pageo Pro | $4.99 | per month |
| Pageo Pro | $4.99 | per month |
| Pageo Pro | $19.99 | per year |
| 1 Day of Pro | $0.99 | one-time |


### GemReader

[App page](https://appshunter.io/ios/app/gemreader-ebook-study-reader/id6814832827)

This app is designed for learning through reading, allowing users to save form answers, highlights, notes, and flashcards within EPUB and PDF files. It offers study tools like flashcard creation and spaced repetition, with an encrypted, offline-first library and text-to-speech functionality.

**Highlights:** Save form answers in interactive ebooks, Highlighting with 6 colors and notes, Create flashcards from highlights, Spaced repetition review deck, Offline EPUB and PDF reading, Encrypted library with optional backups, Text-to-speech for books

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

**In-app purchases:** none


## Frequently asked questions

### Is Calibre ebook reader free?

Calibre ebook reader is free to download, with in-app purchases available.

### Is GemReader free?

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

### Which has better reviews, Calibre ebook reader or GemReader?

GemReader is rated higher. Calibre ebook reader averages 4.6 out of 5 from 19 ratings, while GemReader averages 5.0 from 1 ratings.

### Do Calibre ebook reader or GemReader have ads?

Calibre ebook reader shows ads; GemReader does not.

### Which is updated more often, Calibre ebook reader or GemReader?

Calibre ebook reader ships an update every 9 days, and GemReader every 2 days. Most recently, Calibre ebook reader was updated on November 9, 2026 and GemReader on November 12, 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.*