How are you android guys using spotify with the mojo?
Or am I reading things wrong....
You can generally use any audio player with an external DAC on most recent Android builds, you just need to connect it via a suitable OTG cable and off you go. You won't get bit-perfect playback, since the default audio stack will up-sample to either 96 or 192 KHz (depending on your phone/DAP) whether you want it to or not, but just getting it to play should be straightforward.