Good but needs refinement
I like the app and its layout and it even has a way to adjust the vertical scale resolution by pinching but once you expand it to a 1db per division scale, the response curve is out the top of the display. It either needs a way to scroll up instead of centering around 0 or it needs some form of attenuation adjustment to move the curve down where its visible so I can tune to a +/- 3 DB curve for room equalization
Soundman Dave about
Octave: An RTA for the iPhone