***** "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 X 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 1.9.5

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

● Toggle between Flat, A and C weighted modes
● Snapshot overlay for quick comparison (RTA module)

Ratings and Reviews

4.2 out of 5
58 Ratings

58 Ratings

Don A7 ,

I was surprised how far to push my car stereo settings--nice!

Seems to work best if I attach the iPhone to the car via USB for pink noise generator, and use iPad for spectrum analysis. Doing both on the iPhone alone, the iPhone noticeably diminished the pink noise volume. I used iPhone 7+ and iPad Pro with iOS 10.3.2, and the screen is completely steady. Even with the iPhone 4S, the screen is completely steady. ,

Excellent app

This app works great and have a very pleasing look and feel. I design sound systems and this app is useful to get a visual on how my system is performing. This app is also going to be useful for training or testing employees. The app does what it's supposed to and if you get a good external mic it becomes a lot more precise. This tool is well worth the money and I really couldn't be more pleased with this purchase.

Bildo The Pro Tool ,

Spectacular lightweight analysis app

Hi! Are use this app to assist me and ringing out stage monitors as it is a lightweight easy to use simple and accurate bit of software that does exactly what you wanted to do and stays out of the way otherwise. I give it five stars for its smooth trouble free and solid performance.

App Privacy

The developer, ONYX Apps, 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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