I’m writing this post for announce new version of WP Favorite Post plugin. If you want to read details (installation etc.), you can go my first post about this plugin.
Database integration added with version 1.2 !
* If a user logged in then favorites data will save to database instead of cookies.
* If user not logged in data will save to cookies.
And if you want, you can choose “only registered users can favorite a post” option from admin panel.
You can download wp favorite posts plugin from here.