This.

I dabbled too long around having it’s UI look prettier, but gave up after spending precious months. Now I can’t see a way to have it look like I want it to, and -with respect- that’s never the intention of devs to have it’s UI very customizable.

BUT having your own UI is pretty easy if you know basic JS and HTML; that’s intentional yet kinda hidden behind all the clutter of HA. So if CSS themes won’t do it for you, you can try your chance with that.

So apparently you need to sign up for Sync feature, and the Sync server is not self-hostable…