Thee is also Fotostation, a very robust solution that iOS far more popular in Europe than in the states. A lot of photojournalists, agencies, and publishers use it.
https://www.fotostation.com
Thanks Ellis - first time I have heard of this app.
I checked out the website and it seems to to be an interesting app.
It has several different possible configurations (three, in fact) ranging from something with similar functionality to Bridge + ACR(i.e. a file browser + editing ability) all the way through to a multi-user DAM tool.
I have not downloaded a trial version but I will investigate this app in more detail since it does appear to tick a fair few boxes for those that need something more than a single-user standalone product (AKA Lightroom or Capture One).
Tony Jay