This is an analyzer for sound, vibration and magnetic field. Overall we have the following measuring functions.

* Sound (Analyzer [FFT / RTA / Spectrogram], Scope, RMS, Signal Generator)
* Vibration (Analyzer [FFT], Scope, RMS)
* Magnetic field (Scope, RMS)

You can pinch (zoom) and pan (scroll) on measurement screens other than RTA and spectrogram, and pan (band selection) on RTA. You can pause by tapping the measurement screen. Since the measurement time is displayed at the time of pause, it is suitable for leaving as evidence. Please take a screenshot of the screen in the system standard way.

[Application example]
· Record the present situation as quantitative evidence, such as by using recording and use it for the improvement of obstacles.
· Use it for science education.
· Use it along with the sweep generator to improve the acoustic characteristics of the listening room.
Octave RTA (real-time analyzer) has two configurable items, Please use "Settings .app" and change the following as necessary.
· Window function
· Latency

This application has an audio signal oscillation function, and depending on the operation it may generate sound that is harmful to the human body, so please refrain from using things like headphones or headsets. We are not responsible for damage caused by using that equipment.

The resolution of the spectrum analysis of speech is about 11 Hz inherent, however, the actual resolution is in the maximum of 3 Hz by interpolation processing. It is not the accuracy that can be used to tune an instrument. Please use the instrument tuning application for that purpose.

If you can not find the current point by zooming in or scrolling, you can return to the default state that you can see the whole picture by pressing and holding the measurement screen long.

If a remarkable peak near 1 Hz lasts for more than 10 seconds from the beginning of the spectrum analysis results. It will ignore the peak below 1 Hz after 10 seconds. In most cases, this might happen when the accelerometer is dull.

For a good result with Octave RTA, we recommend using Window Function and Fast Latency Mode.

The adjustable range of the FFT/Scope/RMS gain is from -20 dB to 20 dB.
The adjustable range of the SP gain is from 0 dB to 80 dB.
The noise reduction threshold is from -80 dB to 0 dB.

Allows you to output the data of Sound Spectrum, Sound Spectrogram, and every RMS'.
You can use the data files by on iOS or iTunes File Sharing on Mac.
Please note that the output file of Spectrogram is not small not like other data files.

What’s New

Version 2.0.1

Enabled to change the window function even in portrait mode.

Ratings and Reviews

4.7 out of 5
2K Ratings

2K Ratings

fossilman ,


I worked at a company many years ago in graduate school that engineered and manufactured professional-grade calibration microphones, spectrum analyzers, sound level meters, and dosimeters. Each device cost premium $. And today I just pressed a “Get” button on my iPhone, itself a miracle, and suddenly I have, for free, a spectrum analyzer and sound level meter with options for display, weighting, speed, peak and RMS, etc. And I haven’t even tried the magnetic field sensor option yet.
I have not yet verified and compared this system with calibrated equipment, but for quick acoustic analysis and troubleshooting purposes, this is a godsend.
Miraculous. Thank you developers for your hard work and talent in bringing this technology to the masses.

Developer Response ,

Thank you so much!!

-XX:PermSize=32G ,

Thank you Rikki, very cool

The recent change to zooming is awesome, and I love you for it.
One thing that I would like changed is the scale for VIB Scope. Right now, negative values wrap around and become positive again, making it hard to read the graph in certain circumstances. If the 0 could be put in the middle and have equal amounts of negative values as positive values, that tool would be more useful for me. Also, I was fine with the ads. If you want to add an opt-in ad toggle in the settings, I wouldn't mind leaving it on.

Developer Response ,

Thank you so much!
I'd like to improve that you pointed out on VIB Scope.
Please wait for a while.

yTunesMusic ,

Adds another amazing tool to your iPhone ! 🤫Get it!

Db Meyer, XYZ vibration meter. Oscilloscope. Frequency meter. Magnetic feild meter. And that’s not even half of the functions. I often do field recording work and this app is quick and easy because my phone is already in my hand recording. Eliminates gear. I even think it told me “I love you” JK it did and it high 5 me.
Thanks extremely smart people on the other side of this message. No adds and free....😯😧💩

Developer Response ,

Thank you so much!

App Privacy

The developer, Rikki Systems Inc., has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

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

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