Comparison

OpeNoise vs QRazy

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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

About

QRazy

Features
Read full description

An app to create QR codes and easily manage them. Create a QR code for many different applications with just a few clicks. Contact details, WiFi access, plain text, social media and much more. The QR codes are clearly stored on your device and can be displayed quickly and conveniently.

Screenshots

OpeNoise4 screens
QRazy4 screens

Verdict

The call

OpeNoise and QRazy are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

OpeNoise ships an update every 7 months, QRazy every 9 months. The most recent releases landed on October 13, 2026 and October 10, 2026 respectively.

ScorecardNo meaningful differences
OpeNoise versus QRazy: the parameters behind the verdict, then further details
ParameterOpeNoiseQRazy
PriceFreeFree
Rating4.0 (4 ratings) — better—
Positive reviews85.7% of reviews—
Number of ratings4 — better—
Update frequencyEvery 7 months — betterEvery 9 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.014.0 — better
Further details — not scored
Size12 MB1 MB
Age rating4+4+
DeveloperArpa PiemonteMatthias Krams

In-app purchases

None

OpeNoise

No in-app purchases

None

QRazy

No in-app purchases

Questions

Is OpeNoise free?
OpeNoise is free to download, with no in-app purchases.
Is QRazy free?
QRazy is free to download, with no in-app purchases.
Do OpeNoise or QRazy have ads?
Neither OpeNoise nor QRazy shows ads.
Which is updated more often, OpeNoise or QRazy?
OpeNoise ships an update every 7 months, and QRazy every 9 months. Most recently, OpeNoise was updated on October 13, 2026 and QRazy on October 10, 2026.

Other comparisons