There’s a virtually constant notification asking you to subscribe if you have more than 4 email accounts. It’s a bit intrusive and distracting. When I had the free version I git cloned the repo just so I could remove that notification. The UX would be better (and personally I’d be more inclined to consider upgrading if I hadn’t already) if the UX of the free version doesn’t contain advertisements for the subscription model.
(Originally posted by deanpress on GitHub.)