Lios Calibre Viewer

iOS macOS

Lios Calibre Viewer is a powerful e-book reader designed to seamlessly connect to your personal Calibre library. Access your entire book collection from your iPhone or iPad, read EPUB, PDF, and comic books with a beautiful, distraction-free interface. With offline reading, customizable themes, bookmarks, and highlights, your library is always at your fingertips while your data stays completely private on your own server.

Download for iOS Download for macOS

Key Features

📚

Calibre Library Integration

Connect directly to your Calibre Content Server and access your entire book collection. Browse by authors, series, or collections with full metadata syncing including covers, descriptions, and tags.

📖

Multi-Format Support

Read all your favorite formats in one app. Full support for EPUB with chapter navigation, PDF with smart text detection, and comic books (CBZ/CBR) with optimized page viewing.

🎨

Beautiful Reading Experience

Customize your reading with adjustable fonts, line spacing, and margins. Choose from Light, Dark, Sepia, or Night themes. Add bookmarks with notes and color-coded highlights to remember important passages.

📴

Offline Reading

Download books to your device and read anywhere, anytime, without an internet connection. Manage your local storage and batch download multiple books at once for your next trip.

🔒

Privacy First

Your books, your server, your control. Lios Calibre Viewer connects to your self-hosted Calibre server, keeping your reading data completely private. No accounts, no cloud lock-in, no tracking.

📂

Smart Organization

Browse your library by Authors, Series, or Tags. Use Smart Collections like Recently Added, Currently Reading, and Favorites. Powerful search helps you find any book instantly.

Screenshots

Browse your entire Calibre library with beautiful cover art, filter by reading status, and organize by collections.

Connect to multiple Calibre servers or local libraries. Easily switch between book sources with a tap.

Sort your library by title, author, date added, recently opened, or series to find books quickly.

Import EPUB and PDF books directly from your device, iCloud, or Calibre folder with full metadata support.

Frequently Asked Questions

How do I connect to my Calibre library?

To connect Lios Calibre Viewer to your library:

Make sure Calibre is installed on your computer with the Content Server running
Open Lios Calibre Viewer and go to Settings
Enter your Calibre server URL (typically http://your-ip:8080)
If you've set up authentication, enter your username and password
Tap "Test Connection" to verify, then save

Your library will sync automatically and you can start browsing your books.

What e-book formats are supported?

Lios Calibre Viewer supports multiple formats:

EPUB - Full support with chapter navigation, bookmarks, and highlights
PDF - Smart reader with text detection and page navigation
CBZ/CBR - Comic book formats with optimized page viewing
TXT/RTF - Plain text and rich text files

If a book has multiple formats available, the app will automatically choose the best one (EPUB preferred).

Can I read books offline?

Yes! You can download any book to your device for offline reading. Simply tap the download button on any book detail page. Downloaded books are stored locally and can be read without an internet connection. You can manage your downloads and storage in the Settings.

Is my reading data private?

Absolutely. Lios Calibre Viewer is designed with privacy as a core principle:

Your books stay on your own Calibre server - we never see them
All reading progress, bookmarks, and highlights are stored locally on your device
No account required - no tracking, no analytics, no data collection
The app connects directly to your server with optional SSL encryption

Do I need to keep my computer running?

You only need your computer running when syncing your library or downloading new books. Once books are downloaded to your device, you can read them anytime without your computer being on. For always-on access, consider running Calibre on a home server or NAS device.

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