Updated 2/2022 -App force closes randomly (sometimes upon startup, sometimes when brought from background to fore).Was 5 stars Far superior to stock phone music players (in my case S21 Ultra).I've used stand alone Cowon/jetAudio devices for years. Known among audiophiles for great sound.Android app is great & plug-ins are superb.Worth the total of less than $15 to turn your phone into an almost audiophile device (if you've got good headphones or speakers-if not, you may not hear the difference).