The samples in Harmonica (V. 1.1, Benjamin McDowell; $0.99) sound quite realistic. Like a real harmonica, this instrument is designed to be played by mouth. (You can also play it with your fingers, if you'd rather.) Put your mouth up to the harmonica on the screen and inhale and you get a “drawn” note; exhale and you get a “blown” note. Its biggest drawback is that you can't bend notes. Still, it's a remarkably accurate simulation. Just don't drool on your iPhone while playing it.
FEATURES, AT A GLANCE
High-quality 10-hold diatonic harmonica
12 different keys: G, Ab, A, Bb, B, C, C#, D, Eb, E, F, F#
Works with both fingers and lips
40 built-in songs