Great app, but

First the hertz value is an octave off. Around 440 approximates a4, not a5. Then theres each bar, which is not precisely tuned to each note, which defeats the point of this app. Right now some of the as have 445, 223, when it should be 440 and 220.
This would be worth 5 stars and actually become an actual musicians tool if that were fixed.

ratchet500 about Octave: An RTA for the iPhone