A desire not to put “a computer into the audio setup”, as you say, and use it as a pure streamer is why I went with Lumin. I’m sure Roon is great [never tried it, I used Audirvana when I had a computer and NAS in the mix], but for audio setups without a computer you need a streamer with its own app that can access the services you want, or that can work with *any* UPnP/DLNA controller, or another form of “casting” protocol (e.g., Chromecast or Airplay).
After much research, Lumin was the answer for me: not only is there robust support for UPnP/DLNA so that I can use other controller apps (e.g., mconnect), but the native Lumin app is excellent too with great support for TIDAL and Qobuz. And Lumin products support so many other ways to connect your streaming-service-of-choice (e.g., Airplay, Spotify Connect, and, although I don’t use it, as a certified Roon Endpoint).
I’m so glad Lumin keeps updating their app. I know most audiophiles with their huge libraries of locally-stored music are often tied to their computers/NAS/cores and 3rd-party server/controller software like Roon. But for my setup, I don’t want or need a Roon subscription; I seriously don’t think Roon Labs’ business model is sustainable anyway, in its current incarnation.
But for a stand-along setup (ie., no computer needed) the Lumin app and device firmware is consistently updated so that everything keeps working even as the streaming services innovate or your controller hardware (e.g., iOS or Android devices) evolve.
Cheers,
M1k3