The private mode is basically function as for hiding the song or the music folder as some of us didnt want some of our song to be listened by our friends or our family members. This private mode can prevent something like our friends felt weird or laughing at us for having the song they never heard about or they dont like the song and this matter goes same to our family members. Maybe they can hate us for listening to those song. This private mode can be executed with our own pin or password to enable us to lock or unlock the song that we want to hide. I really appreciate you guys for this feature if its included in the next update of the Poweramp. Thank you.