Using Roon Offline on android device

I have installed roon on my mac, as well as my Onkyo DAP, which uses android. Can I use Roon on the Onkyo when I am not connected to the Mac on which the core is installed? if so how do I do this.

As music is streamed from the core in order to be played to an end point then the answer is no you cannot. You could save offline content from tidal if you subscribe but that too means using the tidal app on the DAP if there is one. Roon remotes can’t operate with roon streams or use roon as a player when the core is not available.