iPad Screenshots


A 12th-octave musical-pitch-centered spectrum viewer for iPad

See all the frequency harmonics from the real-time microphone input. Spectrum is displayed relative to an equal-tempered musical frequency scale. Frequencies bars are highlighted in green when on pitch and in tune (+- 20 cents). The 3 largest FFT peaks are interpolated for greater frequency accuracy readout, with the nearest note value and any pitch error estimated in cents. A fundamental pitch is also estimated, if possible, when different from the frequency of peak amplitude. Frequency range is approximately 2 octaves below middle-C to 3 or 5 octaves above, depending on the microphone used. The amplitude is in uncalibrated dB.

What’s New

Version 1.4.2

Updated for iOS 12, per request.

Ratings and Reviews

2.5 out of 5
2 Ratings
2 Ratings
Tamale Head ,

It works

The app works as advertised. Appears to be accurate and responsive. It is also a nice looking app.

I would like to be able to save certain samplings and compare them with other samplings. Also, it would be nice if the fundamental would light up on the keyboard itself.

Overall a good app so far. Looking forward to added features.


Ronald Nicholson
1.1 MB

Requires iOS 9.3 or later. Compatible with iPad.



Age Rating
Rated 4+
© 2019 HotPaw Productions


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    With Family Sharing set up, up to six family members can use this app.

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