FBReader opens DRM-free ebooks as well as titles protected with Readium LCP.

Supported ebook formats:
• ePub (including ePub3 features), PDF, Kindle azw3, fb2(.zip)
• Comic books (CBZ/CBR)
• DOC, RTF, HTML, and plain text

Great for language learners:
• Instant word and phrase lookups through your preferred dictionary app

Cloud sync (optional):
• Sync your library and reading positions using the FBReader Book Network, a Google Drive based service
• Disabled by default; enable it in Settings

Highly customizable:
• Use your own TrueType/OpenType fonts and custom backgrounds
• Day and night color themes
• Adjust brightness with a simple swipe along the screen edge
• Fine-tune layout, gestures, and appearance

Optimized for every screen:
• Works smoothly on phones and tablets
• Fully optimized for e-ink devices while still performing excellently on standard LCD and AMOLED screens

Easy access to books:
• Built-in browser for online catalogs and OPDS stores
• Support for custom OPDS catalogs
• Or place ebooks directly in your device’s Books folder

Made for readers worldwide:
• Localized in 34 languages
• Includes hyphenation patterns for 24 languages