Feature | Okular | calibre |
---|---|---|
Tabbed interface | ||
Chapter cursor | ||
Document reader | ||
Lightweight | ||
Low memory usage | ||
PDF annotation | ||
Fill PDF Forms | ||
Export to PDF | ||
Text Highlighting | ||
Text to Speech | ||
Trim margins | ||
Highlighter | ||
Optimal performance | ||
Batch conversion | ||
Built-in e-Book converter | ||
Built-in viewer | ||
Customizable | ||
Edit PDF | ||
Handwriting recognition | ||
Multiple languages | ||
Scan documents | ||
File transfer | ||
Freehand Writing | ||
Document annotations | ||
Sync between devices | ||
iPhone/iPod sync | ||
Night mode/Dark Theme | ||
PDF OCR | ||
Clean design | ||
Customer support | ||
Cross-platform | ||
Portable | ||
Vim key mapping | ||
Add/remove pages | ||
Browser integration | ||
Browser extension | ||
Auto update | ||
Bibliography generator | ||
Book organization | ||
Built-in editor | ||
Built-in Adobe Flash Player | ||
Built-in PDF converter | ||
Custom cover image | ||
DRM Free | ||
Email notifications | ||
Facebook integration | ||
File-sync | ||
Handwritten Notes | ||
Indexed search | ||
Integrated PDF Viewer | ||
Library management | ||
Book manager | ||
Live Push Notifications | ||
Live updating | ||
Read fb2 format | ||
Rss to Kindle | ||
SMS Reminders | ||
Supports All Ebooks Format | ||
Sync with e-reader | ||
Update notifier |