Apparently, the new HRT microStreamer USB DAC/amp can interwork with Android devices:
"A microStreamer can be used with an applicable Android platform if used with an OTG host mode cable."
[Kevin Halverson, HRT CTO]
"I need to say this: driving my Audeze LCD3's with the microStreamer (not the easiest headphones to drive well enough to truly show their magic) had me talking to myself when I first heard the magnificent combination! My wifey would hear me saying things like, "this can't be ******* happening," and "this is unreal"...
The HRT microStreamer has raised the bar so high in its category I hope it gets all the accolades it deserves. In uber-portable headphone amp/DAC combo solutions for the computer I can't think of another component outside the Audioquest Dragonfly, which to my ears doesn't have quite the dynamic punch of the microStreamer that even approaches the sonic performance of this miraculous little aluminum brick. It's like an audiophile’s reference-system-in-a-box. You have to hear it to believe it."
What also interests me is whether a smartphone could provide enough power to run the mobileStreamer which is really interesting in terms of its diminutive size, Kevin replied me and mentioned " ...it does have a higher power consumption and would not be an appropriate choice for some installations."
I wonder if anyone could shed some light on this issue.