iPhone Screenshots


"Audio Frequency Analyzer" is a powerful real-time audio analyzer (RTA) app for iPhone.

This app can measure the frequency response in 30 split band scale of 1/3 octave in real time. Also it can be displayed the FFT analysis result.

"Audio Frequency Analyzer" is available in a variety of applications, such as sound room tuning, speaker settings, audio equipment testing, stage setting measurement, evaluation of sound mixing environment and Investigation of noise environment.

- Frequency spectrum response measurement of 1/3 octave unit, 30 bands. (OCT)
- FFT analyzer. (FFT)
- Frequency display : 20 - 20000 Hz (X-axis)
- Logarithmic amplitude display. (Y-axis)
- Calibration function at 1/3OCT mode. : 1/3 octave band offset and overall offset setting.(Calibrate)
- Display measured value of 1/3 oct bands. (Oct val.)
- Save/Load function at Octave band offset setting. (Set/Info.)
- Peak Hold function. (Hold)
- Display response control. (Slow)
- Function of touch-scroll to adjust visible amplitude ranges.
- Reset of Measurement display position. (Scroll reset)
- Snapshot of Measurement display. (Snap)
- Supports built-in microphone, headset microphone, and external digital audio connection.

The authorization for access to the built-in microphone will be confirmed by the iOS system at first boot. Please enable access to the microphone.

Please visit our iOS App Support page for more information on this app.

What’s New

Version 6.1

- Added the peak hold function for FFT analysis.
- Minor improvements.
- Requires iOS12.5 or later.

Ratings and Reviews

5.0 out of 5
2 Ratings

2 Ratings

coolderp ,

Great tool

This a great tool that just plain works and is reliable. Been using itfor years! Really helps ringing out monitors on stage.

App Privacy

The developer, TOON,LLC, 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


  • Family Sharing

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

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