Is there an Equalizer App for iPhone 6 Plus that can be used in place of the one that come on the iPhone?

I would like an EQ more like the one in iTunes on my iMac where you can tweak the highs and lows to your own liking as you play a song. I would also like to be able to save my own presets. Is it also possible to be able to tweak your music as you play it from the Music application on the iPhone without having to import it into another app? I just want an EQ that will allow you to keep using the Music Player on the iPhone while tweaking the music with the EQ app in real time. Is this possible?