It does but downloading is buggy and it seems like the position doesn't sync then, which is annoying
In theory being able to listen from multiple devices is nice though
My current setup is to host the audiobooks in a Plex library and use a third party app like Prologue [1] on iOS or Chronicle [2] on Android which both work really well for offline listening and progress tracking.
[1] https://apps.apple.com/us/app/prologue/id1459223267 [2] https://play.google.com/store/apps/details?id=io.github.matt...
I'm seeing other users commenting in particular that its syncing between player devices is much more robust than any other tools offer.
On my previous phone downloading worked on its own and syncing the position of streamed files worked but the position of downloaded files wouldn't sync.
However I just switched phones and now downloading doesn't work at all (if I try to add a media folder outside of the Downloads folder it will get permission errors; if I add a folder inside the Downloads folder it will allow me to add it but the app will crash whenever I actually try to download a file).
Basically it just seems to be incredibly buggy so maybe it's just a crapshoot whether it will work on your phone.