A+ App
This app is awesome. You can set the EQ to however you like your music to sound. The bass boost is a really nice touch. I paired my iPhone 6S+ to a Sony GTK-XB7 470 watt dual speaker system ($199) and all my music sounds insanely good....so much better than the native music app for iOS that Ill never go back to using. Its 100% worth the download.
Phatkat13 about
Equalizer+ HD music player, v2.2.1