Interesting new DAP from Astell & Kern that will be Roon Ready + Roon ARC:
https://www.astellnkern.com/product/product_detail.jsp?productNo=150
Until know Astell & Kern track record related to Roon Ready and ARC has not been the best.
Maybe there is hope.
Torben
Still wont be bit perfect on ARC as its not in the app to do so.
Just ordered one. I will let you know how it behaves after I installed Roon and Arc 
Received my Kann Ultra today. Wow, what a device. Think for me its endgame stuff . Installed the Arc APK file and it works like a charm! Same as on my phone. Only better sounding. Also tried to install the Roon APK but that doesn’t seem to work. Don’t know if that should though… 24/3, No, only Arc is supposed to work on the Ultra, so everything is fine. The bugs are the same in APK file as on Android: sorting of albums doesn’t work here either. So that’s consistent 
After some time playing around with the Kann Ultra wondering what Roon ready meant while only Roon Arc can be installed, I found out it is also an endpoint for Roon. Ha, learning every day . And it is actually very cool to operate your Ultra with a remote…
Yes, the Ultra sounds great. Using it as the hi-res source for my mobile system. Since the Ultra can use a 1TB SDXC card for use with Roon ARC as the library I just wish it would be updated to act as the Roon server with Qobuz as a service when driving and using my phone as a mobile hotspot. It’s a PITA to have to switch between using Roon ARC on the Ultra for the library and Qobuz for streaming. Would love if Roon, on the Ultra, would function like the server to enable the use of the library and Qobuz service.
Just saw post, after i replied on Thorens post. Have you had success in “updating” versions of ARC, Qobuz, Tidal. Mahalo
ARC downloaded and installed just fine. Qobuz is up to date from my initial download/install. I don’t use Tidal.