I only use sound hound!
Of all the music discovery apps out there, the two main ones that come to my head is Shazam and sound hound. Of the two, I only used sound hound as I found it discovered music better and you could even sing the song and sound hound found it. To me, sound hound is the best out there.
Smoothcrimnl1 about
SoundHound∞ - Music Discovery, v7.0.1