I would like to voice my support for the request!
The web version is ok, but a real program is sooo much better. Apart from the reasons already given, having seperate windows plus the speed of an app (as opposed to loading the page on the web every time) are additional points for developing a real seperate linux app. I don't think this should be too difficult either, dropbox has a linux version, firefox has a linux version, along with GIMP, VLC, 1Password, Atom and even Teamviewer! I believe Evernote would (should?) easily fit in this list as well!