OpeNoise

OpeNoise

Noise level meter

4 ratings
7 reviews
Free

Details

  • Released
  • Updated
  • June 18, 2018
  • January 7, 2026

Features

OpeNoise screenshot #1 for iPhone
OpeNoise screenshot #2 for iPhone
OpeNoise screenshot #3 for iPhone
OpeNoise screenshot #4 for iPhone
OpeNoise screenshot #5 for iPhone
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About

This application measures real-time sound pressure levels, displaying minimum and maximum values. It offers advanced analysis like third octave and FFT, with options to save data, calibrate, and share measurements with a community. Note: it is not intended for professional use.

Real-time A-weighted sound pressure level measurement
Minimum and maximum level tracking
Third octave and FFT analysis
Data saving in text file
Calibration functionality
Measurements displayed on a map
Community sharing of calibration and measurements
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What's New in OpeNoise

3.3.0

January 7, 2026

performance improvement and minibug resolution

User reviews

Does what it says on the tin

It’s open source and it works very well. 5 stars

Response from developer

Thanks!

Works

This app does what it says it does and no more. I like it’s settings UI controls, though I wish it could display measurements faster than once per second.

Response from developer

Thanks!

Ottima App

Per essere una app da smartphone è precisa, ho confrontato i risultati con un fonometro e sono molto simili

Useless

The app made no sense. You click Start, as if you’re saving the readings. Then at some point you click Stop, and save. But then when you try to recall what you saved, it’s just a bunch of numbers that mean nothing. Deleted the app after using it for several minutes. Just useless.

Response from developer

We are sorry that you are unable to use the app. The data saved in the text file represent sound levels. A brief explanation of how to use the app is on the information page, however, you must have some expertise in mathematics and acoustics to understand exactly what the data means.

Ottima, quasi.

Ottima app, ma c’è da migliorare il dark mode e renderla graficamente più integrata con iOS. Per il resto: ottima 👍

Developer apps

FAQ

What is OpeNoise?

OpeNoise is a real-time noise level meter that measures sound pressure levels, minimum and maximum levels, and offers third octave and FFT analysis. It allows users to save data, calibrate the device, and share measurements with the OpeNoise community.

Is OpeNoise suitable for professional noise measurements?

No, OpeNoise is explicitly not intended for professional use and does not guarantee accurate noise measurements for legal compliance. A comparison with a professional noise level meter is required for accurate dynamic range assessment.

How does OpeNoise handle data?

OpeNoise can save measurement data in a text file. It also compiles metadata and allows for sharing of calibration and measurements with the OpeNoise community for statistical purposes.

What devices does OpeNoise support?

OpeNoise is available for iPhone, iPad, and iPod devices.

What is the age rating for OpeNoise?

OpeNoise has an age rating of 4+.

How often is OpeNoise updated?

The latest version of OpeNoise is 3.3.0, last updated on January 7, 2026. The app was initially released on June 18, 2018.

Does OpeNoise have ads?

OpeNoise is ad-free.

What is the user sentiment for OpeNoise?

OpeNoise has a rating of 4.0 stars from 4 ratings, indicating generally positive user sentiment based on the available data.