OpeNoise has 100 thousand installs. Users rate it well: 4.4 stars from 272 ratings.
OpeNoise is made and published by
Arpa Piemonte.
AppBrain is an independent app data site and isn't affiliated with Arpa Piemonte.
The app name, icon, screenshots and description belong to Arpa Piemonte and are shown as
published on Google Play.
About OpeNoise
“Noise level meter”
Pros & Cons
Real-time, A-weighted SPL with spectral analysis
Map-based visualization for location-aware monitoring
Open-source under GNU v.2 with transparent development
Free to use with calibration and data sharing
Not intended for professional use; accuracy cannot be guaranteed due to device microphone variability
Requires technical knowledge for proper calibration and interpretation
Data quality depends on hardware and environment and is not a substitute for professional meters
OpeNoise is a tools app developed by Arpa Piemonte.
How many times has OpeNoise been installed?
OpeNoise has been installed 100 thousand times. In the last 30 days, the app was installed 1.1 thousand times.
What is the rating of OpeNoise?
OpeNoise is rated 4.36 out of 5 stars, based on 270 ratings.
Is OpeNoise free?
OpeNoise is free. The app size is 10.22 MB. The latest version available is 3.4.0. The last update was on September 22, 2026.
What are the requirements for OpeNoise?
OpeNoise requires Android 5.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play since May 2016.
Description by Arpa Piemonte(from Google Play)
OpeNoise is a real-time noise level meter.
TECHNICAL SPECIFICATIONS: - Real-time A-weighted sound pressure level measurement - Minimum and maximum level - Third octave and FFT analysis - Data saving in text file - Calibration - Displaying measurements on a map - Metadata compilation - Sharing calibration and measurements with the OpeNoise community
TERM OF USE This app is not intended for professional use, it does not necessarily guarantee an accurate noise measurement. Since each device has a different response to noise, a comparison with a professional noise level meter in the measurement dynamic range is required. The utilization of the app requires adequate technical knowledge and skill; an extemporary measurement might not be correct. The calibrations and measurements sent to the OpeNoise community will be used for statistical purposes only and cannot be used in any way to verify compliance with legal limits.
CREDITS Developers: Arpa Piemonte (Regional Agency for the Protection of the Environment of Piedmont - Italy - www.arpa.piemonte.it). The code is open source under GNU v.2 license or later, the code is on GitHub: https://github.com/Arpapiemonte/
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Probably the best noise and ambient sound measuring app I've ever used that didn't cost me $80.
★★★★★S M· Oct 1, 2018
Did almost exactly what I needed it to with a clean usable interface. Only complaint is that I can't figure out how to save recorded data. Probably something simple I am missing. Thanks for the great open source app!
★★★★★R Cha· Feb 5, 2026
Great and complete app! I still to calibrate it, but everything seems working well. Extremely appreciated the privacy respect and the source on git ! Gracie agli sviluppatori, ottimo lavoro :)
★★★★★Elliott· Mar 29, 2024
This app is brilliant, the best by far! It is the only one I have found that can display dB(A) and not just dB(Z). The wide choice of display options is greatly appreciated. I see a lot of people leaving negative reviews on here complaining about the need for calibration, ALL APPS NEED CALIBRATION if they claim otherwise, they are lying! My only wish is to be able to create custom AEQ times as seeing 3, 5, or 15 min averages is very valuable! If you need a sound level app, this is it. 5 starts!
★★☆☆☆JennPlays93· Mar 20, 2024
In order to calibrate the app you need a professional sound meter. While I love that this app doesn't sell to third parties, this made the app useless for me. I got this app to be able to measure the white noise during my baby's nap times to avoid hearing damage. This just isn't the app I needed for my intended purpose.
★☆☆☆☆Stan Senter· Feb 7, 2024
Never opened. Deleted, downloaded, start page, no activity. Deleted.
★☆☆☆☆Chris Marshall· Mar 14, 2025
Doesn't do anything other than countdown to zero. Crashes after opening often.
Google Play Rankings for OpeNoise
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Technologies used by OpeNoise
10 permissions·4 libraries
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