What's NewDesign updates & performance improvements for iOS 7.
App DescriptionWant to know the frequency of a signal or how a signal looks like? Use your deviceâ€™s microphone to see waveform, frequency and even the musical note of a signal in real time.
November 15, 2013 New version 1.2
December 10, 2012 New version 1.1
July 13, 2011 Initial Release