Two of them, Idagio and Primephonic, have been created specifically for classical music listeners. The other four, Apple Music, Qobuz, Spotify and Tidal, cover all genres. As we’ll see, there are many different aspects to these services: their look and feel on the phone and the desktop, how you search, what audio quality they provide, their different ways of helping you choose what to listen to, and a number of special features. – BachTrack