nice. Im trying it out. I'm not that bothered personally about integrations (a DOI is really easy to copy and paste from one tool to another). But I'll get in there first.. I switched to Paperpile a while ago (after the death of Citeulike RIP) - and it's pretty darn perfect. I'd vote a +1 to have that as a citation source..
If you inspect the app contents like on your FS, right click the app and press show contents on the app you can tell if its an electron app usually if it has .asar files
PS is this a electron app? It has that feel..