More features in Pro version:
tap to search an author
tap to search the journal
related citations
Post a comment for an article to public
Write a note to yourself
View public comments for an article
search by PubMed ID, just enter the id in the search box
To migrate your saved articles into the pro version:
install the pro version
start the free version
press menu on the initial screen of the free version
then "Upgrade"
Better UI
Fix title and journal name display problem.
Add function to save into Evernote
Add view all article link in the email