I've read that Qobuz has better sound quality than Tidal, but the hi-res is more costly. My only complaint about Amazon is that the stream has momentary dropouts here and there, but I'm going to stick with it for a while to see if it improves. I've been able to stream the Amazon app through Foobar to use the DSD Transcoder. It's a bit of a jury rig but it works. I don't see the need to dish out money for the other apps as the sound quality with what's free seems to be more than sufficient.