iEqualizer: Bass Booster Amp

I was excited when I read the reviews, but this requires access to digital source media to modify output sounds. If you use a streaming music service, this does not work. Perhaps this deserves a higher review but I thought this would work on streaming content.

Outstanding

This is amongst the only Free Apps (with ads) that allows the most flexibility in terms of tuning and amplifying your music. It does some funky stuff with the titles imported from iTunes but a little organization with playlists helps clean that up. I would definitely recommend.