An even closer equivalent is Letterspace (for Mac/iOS), but Bear Notes is a very elegant implementation of the concept (I'm running the beta).

As for Scrivener: yes, it does indeed sync through Dropbox, and is relatively easy to set up. But it's a good idea to shut it down on one machine before syncing with Dropbox on another, otherwise you can find conflicts crop up. Scrivener does resolve them, but at the cost of some manual time.

Stephen Zeoli wrote:

Bear Notes looks interesting, but it also appears to offer much of the
same functionality as Ulysses.

Another option could even be Scrivener, which has a Windows version in
addition to Mac and iOS. It is supposed to sync through Dropbox, though
I'm still trying to figure that out.

Steve Z.