I have the Sony MDR1000X headphones, Sonys app wont find them so I have no idea how that app works, so, I tried the Denon app, wow, that EQ! Not just presets... Wow, I can adjust treble AND bass and everything in between! Plays iTunes library, radio stations both local and not so local. Cant find anything lacking at all with this app. Well worth the $1.99 for full version, (to access that beautiful EQ).
DPR-TUC_AZ about Denon Audio, v1.1.7