We're getting there.. The backend supports it now. If you send me a list of your requirements (just create a github issue here https://github.com/burtonator/polar-bookshelf/issues) I will look at adding the functionality you need.

We're adding support for DOI lookup and APIs like Arxiv so you could just add a DOI to polar and it will fetch the PDF and keep the metadata.

Will also support export to bibtex too.

Our big focus right now is shipping 2.0 so that we have a more modern platform that can scale us moving forward.

Great to hear! I'm actually a week away from finishing my undergrad thesis (ironically procrastinating on that now), so kinda stuck with Zotero for now. Once that's complete I'll take a good look at polar.