Beautiful interface and is very fast. Often crashes on me though when I try to rate or filter photos though. OS X 10.11.6. Might be a permissions issue for that folder. Still filtering on rating didn't work for me either even when I was able to rate on some folders. Frustrating. Turns out toolbar filtering doesn't work but menu filtering does work. Does not consistently read XMP style Bridge/FastRawViewer ratings. It doesn't seem ApolloOne writes ratings which other applications can view either. Lyn does read ApolloOne ratings but sadly DxO Photo Lab and FastRawViewer do not. You can move files just by drag and drop but they copy don't move.
Keep in mind the full app is $10 (fantastic deal if it would work for rating). In the meantime, though not as pretty, FastRawViewer is very reliable and stores rating data in XMP files which Adobe Bridge, Lightroom, DxO Photo Lab, Capture One and Iridient Developer all pick up. I'm DxO Photo Lab and Iridient Developer user myself.
Lots of potential here. I'd love to drop $10 on it right away if the filtering would work consistently and ratings and labels were kept in compatible XMP files which would work with Adobe Bridge compliant applications like DxO Photo Lab and FastRawViewer. ApolloOne is worth buying for its ability to show you where your focus point was when browsing through a shoot.
Focus point reveal worked for Canon 5DIII, 5DS R, Sony A6300 and Fujifilm X-H1. I.e. It's the most reliable feature in ApolloOne strangely.