Equaliser and cost
It's worth noting that the equaliser works with bluetooth headsets. Most other apps don't support this.
This is a great app and well worth £3 of anyone's money. This is the trouble with these app stores - there's so much crap for 50p that people start complaining about paying a few quid for a decent app.
I switched to Android from the Windows Mobile world where apps regularly sell for £20. I must have spent a fortune over the years. So £3 is nothing for such a decent app.