OpeNoise vs Decibel Reader
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OpeNoise
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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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/ KEYWORDS noise level meter, level, sound, noise, measure, measurement, dB, db, dBA, dB(A), decibel
Decibel Reader
Measure ambient noise levels with real-time readings, tracking minimum, average, and maximum decibels. Offers calibration for accuracy and a dark mode for comfortable viewing. This tool helps you understand your sound environment.
- Real-time decibel measurement
- Calibration for accuracy
- Track min, average, and max noise levels
- Dark mode for low-light use
- Simple and intuitive interface
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Introducing Decibel Reader, a handy tool for measuring noise levels quickly and easily. Easy to Use Our simple design makes using our app a breeze. Just open it up and get real-time noise levels right away. Calibration feature Calibrate the meter for more accurate readings. Track Noise Levels See how quiet or loud it is around you. Our app shows you the lowest, average, and highest noise levels. Easy on the Eyes Enjoy our app even at night with our dark mode. It's smooth, modern, and easy on the eyes. Here to Help Got questions? Email us. We're ready to help you. Decibel Reader isn't just a noise meter. It's a trusty tool for knowing how much noise there is around you, whether at work, outdoors, or at home. Try Decibel Reader. Monitoring noise has never been this easy. Download it today. Decibel Reader is free. You can use it forever, at no cost. However, Decibel Reader does offer premium features for its subscribers. If you decide to purchase an upgrade, you can unlock additional features, i.e. remove ads and enable change description feature. Terms of Use: https://kociapp.github.io/Decibel-Reader/term-of-use Privacy Policy: https://kociapp.github.io/Decibel-Reader/privacy-policy
Screenshots
Verdict
The clearest difference is rating: Decibel Reader at 4.5 against OpeNoise's 4.0. Decibel Reader also leads on update cadence (every 2 weeks vs every 7 months) and ratings volume (24 vs 4). OpeNoise's advantage is in-app purchases (none vs 6) and ads (none vs shown). On price, review sentiment and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Decibel Reader sells 6 in-app purchases, starting at $3.99 per 7 days. OpeNoise asks for nothing beyond the download.
Decibel Reader holds the better App Store score, 4.5 against 4.0. That said, the two scores are not equally well evidenced: Decibel Reader has 24 ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 86% of OpeNoise's written reviews are positive against 80% of Decibel Reader's, so the app with the better star average is not the one people write more warmly about.
OpeNoise ships an update every 7 months, Decibel Reader every 2 weeks. The most recent releases landed on September 26, 2026 and September 18, 2026 respectively.
| Parameter | OpeNoise | Decibel Reader |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (4 ratings) | 4.5 (24 ratings) — better |
| Positive reviews | 85.7% of reviews — better | 80.0% of reviews |
| Number of ratings | 4 | 24 — better |
| Update frequency | Every 7 months | Every 2 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 14.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 18 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Arpa Piemonte | Andy Sutanto |
Customer experience
OpeNoise
Decibel Reader
In-app purchases
OpeNoise
No in-app purchases
Decibel Reader
- Decibel Meter Pro - 1 Week$3.997 Days
- Decibel Meter Pro - 1 Month$7.991 Month
- Sound Level Meter - 6 Months$19.996 Months
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- Noise Level Meter - 1 Year$29.991 Year
- Decibel Meter Pro - 1Y 23 Days trial$29.991 Year
- dB Meter Pro$49.99
