Another update on Accudio - this has got to be the best money spent on an EQ app hands down. A chock full of customization and the best part of my concern is that it's not a battery vampire. The only irk about it is, that it's a wee bit buggy, and it'll crash on you when you're switching settings etc. Otherwise, while you're listening it's all smooth sailing with smooth sound to boot.
Accudio is an vampier, it sucks 1% every two mins of just audio.
Other issue is....not everyone will know how HD650 or K701 will sound like, only an audiophile would know it. This app make sense only to Head-if'ers
all these said, I do accept Accudio is great EQ app