There’s a Noise Compensation mode as well, which automatically adjusts your volume level, and then there’s a frequency masking algorithm in it for comfortable sounding music. You can grab a music file on your iPhone, and then with Bass Booster, mess around with the bass, volume level, and more.Īdditionally, there are ambient sound adjustments - which are all of your road noises, birds chirping, etc. Bass Boosterīass Booster is another great choice, actually working with music files directly on your phone. Best Audio Volume Booster Apps for iPhone 1.