We probably spend as much time working on it than on the desktop one, but unfortunately it is much harder to develop for mobile, especially when you have to make sure it works on the many different Android devices and iOS versions, plus the extra work to comply with the ever changing requirements from the Google and Apple stores. Many of these changes are not visible to the user, but without this boring never ending maintenance work the app simply wouldn't exist.
We do plan to update the UI/UX of the mobile app though, as we're aware it could be made more intuitive. I'm very keen on improving this and hopefully it will happen this year.
In my opinion it's not worse than the desktop app (but I don't really like both of them - I'm just glad it syncs successfully)