I have always been searching for a proper equalizer app for my music. It is extremely versatile and i can use it to play with any Bluetooth device, airplay, or headphones. It truly is fantastic and Ive been referring it to all my friends and family. It is a steal at $6.99 (what I paid for it)! You wont find a more detailed an worthy app like this one. I hope there will be am update sometime to make it sync with the start and stop times from the custom settings in iTunes like Music has (8.4) IPhone 5s (8.4)