Annoying "playback can't be played on this device" error a lot of the time and long pauses when starting a track (if I don't get above error). Sound quality is excellent and full Hi res flac files is great. Pitty about clunky app. Spotify app would be the easiest to use (not audiophile quality though), then tidal and this app last (fail for me). You can use this through third party software like USB audio pro. But rather use app on the go. Thinking about unsubscribing. I'm using a S21 ultra.