***** "As a former IEEE Technical Committee Chair for Signal Processing, I find this app amazingly flexible and useful. Works very well with its proper designed-in control selections." - Roblake

Spectrum Analyzer for iOS 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:
● Octave Band Real Time Analyzer
● FFT Plot (Fast Fourier Transform)
● Spectrograph module
● Test Tone and White/Pink Noise Generator
● Native iPhone 6 graphics

>>> Check out the demo videos at

Audio input may be acquired via the built-in microphone or an external measurement microphone. For best results we recommend using a calibrated measurement microphone connected via USB audio interface or iPhone dock connector. This allows for high precision and flat frequency response, as well as for stereo input.

Audio credits:
"Basement Floor" and "Enchanted Journey" by Kevin MacLeod
"Evening Birdsong" and "Cuckoo" by Benboncan

What's New

Version 1.9.1

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

● 64-bit
● Mic calibration
● Minor fixes

Ratings and Reviews

Analyze Music in Library

chris audio

It's a useful app, but would be so much better if it could analyze the tunes in your music library (i.e open & playback a song)

Great app!


It has come in very handy for debugging switched mode power supply designs to track down audible buzzing etc.

Only suggestions are:
1) screenshot button
2) ability to save to csv data file for use in MATLAB etc.
3) is there a way to use some kind of broad spectrum USB microphone?

Screen flicker

Tim buktwo

Since an ios update the screen of my ipad strobes when i run this app.

Shame because the app is the best of its kind otherwise.


11.5 MB
Requires iOS 7.0 or later. Compatible with iPhone, iPad and iPod touch.
Age Rating
Rated 4+
© 2015 ONYX Apps


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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