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FFT Plot - Real Time Sound Frequency Analyzer

By ONYX Apps

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***** "I use this app to detect sound feedback problems on live show and it became helpful and practic."

FFT Plot is a powerful real-time audio analysis app. Designed with musicians and recording engineers in mind, it can also be used by anyone interested in the world of sound. Ideal for room tuning or speaker tuning, the app enables portable, precision audio measurement and visualization.

Feature Highlights:
● FFT Size (2048 to 16384 points)
● Fast, Slow and Infinite Averaging
● Window function (Hamming, Hann, Rect)
● Peak Frequency detection
● Linear and Logarithmic scale
● Pan to adjust visible dB range
● Draggable cursors
● Retina display and iPhone 6 ready

FFT Plot is also available within our Spectrum Analyzer suite, which also includes Octave RTA, Spectrograph and Tone Generator modules. If you need more than just FFT, please search for "Spectrum Analyzer" app.

Audio credits: "Evening Birdsong" and "Cuckoo" by Benboncan

What's New in Version 1.2.1

Thank you for helping us improve FFT Plot app! Please rate it on the App Store now, so we can make it even better!

● 64-bit
● Minor fixes


iPhone Screenshot 1
iPad Screenshot 1

Customer Reviews

I really like this app!

I used it to diagnose a whistle sound in an air handling unit. It works quite well and I have told several other people about it. I use an iPhone 5 and when you take a screen shot and upload it to your computer, it looks very professional.

The other features are very nice, too. My only suggestion is to allow zooming in on the Hertz scale.


I use this app when I'm performing the final tuning in car audio systems and I'm impressed with the response and resolution it has. It could be better if it supported external microphones such as ZOOM's XY and omni capsules but performs pretty reliably through the iPhone's internal microphone. And fairly accurate up against my ARC software in my recording studio studio. Well worth the money if you need a good FFT

Pretty great! Could have better decibel calibration

This is an awesome app. Fastest and highest resolution FFT I have seen on App Store. Professional development and works well. My only request is that there be a better measurement system of overall volume ("60dB" for voice and "95dB" for concert, etc.)

Oh! Also, please add split screen support for iPad!

FFT Plot - Real Time Sound Frequency Analyzer
View In iTunes
This app is designed for both iPhone and iPad
  • $4.99
  • Category: Music
  • Updated:
  • Version: 1.2.1
  • Size: 13.1 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

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