I kind of agree with PE. I time track around 20 projects and I'd love to see something inside Evernote but it would never compare with a proper time tracking app or would take years to get to a pro level.
I've found Toggl to be the best but expensive (in a relative sense). To be fair most time tracking apps cost more than the average Evernote subscription but offer great features.
I think.... big think, as not tested, that Toggle sort of integrates with Evernote web, or it used to!