Better than a hardware equalizer
Problem: you have to copy playlists to Dropbox, it plays, but cant work with Apples DRM. Until Apple changes its policy or Sherlocks (copies) this program, this is the best audio program Ive used. I bought a portable headphone amp (FiiO E11K) but in my pretty good cans, it offered nothing added over my iPhone. This Boom for IOS really makes a huge difference. Ive had this app long enough to see a few upgrades, and its always getting better. I dont listen to this all the time, but when I want to hear my favorite music, it sounds so much dialed in. And now I have presets for my different headphones and earpods. They all sound significantly better! Totally worth whatever it costs compared to a bulky, rechargeable expensive separate device.
PureRainX about
Boom: Bass Booster & Equalizer, v1.2