I’m sorry, I should have been clearer. Yes, I meant for streaming. I also have all my favorite music downloaded and play them locally (sort of, self-hosted from my home server). But way back when I was part of the Spotify crowd I came across great songs I didn’t know about, so streaming is a great way to find those hidden jewels. I just don’t want to have any of those apps trying to mine a boatload of data constantly from my devices.
I only use K9 on Android. Everything else, web-based.