Readwise Plugin for Calibre is a plugin to export your highlights to 
Readwise. Readwise helps you get the most out of your highlights by reviewing them periodically - a technique called Spaced Repetition.
Installation- Download the attachment on this post.
 
- Open Preferences -> Plugins -> Load Plugin From File and select the attachment you downloaded.
 
- Restart Calibre.
 
Version History:
GitHub