FFTWave 4+

Eisaku Nozu

Designed for iPad

    • 4.6 • 9 Ratings
    • Free



This app displays the waveform of the sound from the microphone.
In addition, it can display a spectrum by Fourier transform.
You can check the frequency characteristics of the sound.
There are functions of peak detection, peak hold.
Supporting the Pinch Zoom Gestures.
It help sound adjustment and howling analysis.

What’s New

Version 1.4

Fixed a bug that did not work properly on iOS16.

Ratings and Reviews

4.6 out of 5
9 Ratings

9 Ratings

Yoders.6 ,

A Down-To-Earth Spectrum Analyzer and Oscilloscope

There are no ads you have to worry about with this app, it’s very straightforward to use, and it works exceedingly well with external audio interfaces like my IK Multimedia iRig 2, which is typically used with guitars and other musical instruments. Perfect for those of us who still like to repair tape decks, where precise frequency readings are essential, especially for motor speed and playback head azimuth adjustments.

The app was definitely a big help for replacing the belts on my Sony cassette deck from 1996. 👍

fuzzyalligator ,

Good App

A decent free FFT app. I’m not sure of its accuracy, but that may be a factor of the iPad microphone too. It has an easy to use display, and clearly shows the peak of the spectrum, as well as a view or the waveform.

Charlie C716 ,

Easy to use but need to improve accuracy

App is very intuitive and free. It shows numerical values of frequency of peeks. However, the value is not super accurate. For example, the middle A sound is 440Hz. The app shows 441.4. And it’s happening on both my iPhone and iPad. So it’s very unlikely due to the microphone.

App Privacy

The developer, Eisaku Nozu, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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