Can I put flacs on my phone and listen using Roon?

[DelPrado]

If not, and I dont think I can, is this something being considered?

[philr]

No you cannot and yes it is being considered. See this.

Mobile Music Sync and Streaming [On Roadmap]

It would be great to be able to take the music away with us, via sync or via streaming, directly to mobile devices. Space is not an issue for us lucky Android users whom have Micro SD card capability and for the rest, there’s always streaming. I have a great little 24 bit DAC in my Sony Z5 that sounds quite good for a mobile. I came to Roon, specifically because Plex does not have 24 bit sync support and each time I raise it, they get all confused about what it is ultimately saying they alrea…

There may be problems with iphones and ipads due to the inability to run Roon and play to the local output at the same time. See this.

iOS device - iPhone, iPad etc. as an audio playback device

The technical issue is pretty straightforward: Xamarin’s garbage collector pauses threads regardless of whether they are running managed code or not. This interferes with the threads playing the audio and causes dropouts. In theory their cooperative mode garbage collector will avoid this problem once it’s stable, by only pausing managed threads. The problem would exist on Android too, but Android’s application model is more flexible than Apple’s, so we can sidestep the issue by running the audi…