First of all, I have only used Primephonic.
In terms of audio quality, while most of Primephonic’s 3.5 million recordings are 16 bit/48 kHz, there are many that are 24/96 and some that are 24/192. Of course a new 21st century recording is more likely to be 24/192 than a remaster of a recording from the 1960s.
Probably the best part of Primephonic is that they are constantly improving their service. They are expanding their catalogue on a daily basis, and they regularly update their apps.
In terms of audio quality, while most of Primephonic’s 3.5 million recordings are 16 bit/48 kHz, there are many that are 24/96 and some that are 24/192. Of course a new 21st century recording is more likely to be 24/192 than a remaster of a recording from the 1960s.
Probably the best part of Primephonic is that they are constantly improving their service. They are expanding their catalogue on a daily basis, and they regularly update their apps.