# OpeNoise vs Decibel Meter · Sound Analyzer

The clearest difference is rating: Decibel Meter · Sound Analyzer at 4.7 against OpeNoise's 4.0. Decibel Meter · Sound Analyzer also leads on ratings volume (1.3K vs 4) and update cadence (every 2 months vs every 7 months). OpeNoise's advantage is in-app purchases (none vs 8). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. Decibel Meter · Sound Analyzer sells 8 in-app purchases, starting at $1.99 per 7 days. OpeNoise asks for nothing beyond the download.

Decibel Meter · Sound Analyzer holds the better App Store score, 4.7 against 4.0. That said, the two scores are not equally well evidenced: Decibel Meter · Sound Analyzer has 1.3K 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 78% of Decibel Meter · Sound Analyzer'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 Meter · Sound Analyzer every 2 months. The most recent releases landed on September 21, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | OpeNoise | Decibel Meter · Sound Analyzer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/openoise/id1387499991/reviews) | **[4.7 (1.3K ratings)](https://appshunter.io/ios/app/decibel-meter-sound-analyzer/id1624503658/reviews)** |
| Number of ratings | 4 | **1.3K** |
| Positive reviews | **85.7% of reviews** | 78.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 months** |
| Monetization | **Free** | Subscription |
| Size | 18 MB | 39 MB |
| Requires iOS | **14.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Arpa Piemonte](https://appshunter.io/developer/1317255035) | [AppLiks Sp. z O.O.](https://appshunter.io/developer/1804335622) |

## What reviewers say

### OpeNoise

[App page](https://appshunter.io/ios/app/openoise/id1387499991)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Decibel Meter · Sound Analyzer

[App page](https://appshunter.io/ios/app/decibel-meter-sound-analyzer/id1624503658)

Measure ambient noise levels and sound exposure duration in real-time. This app displays acoustic intensity in decibels with detailed visual reports and supports photo/video overlays with noise data. Protect your health from noise pollution.

**Highlights:** Real-time decibel meter, MIN, AVG, MAX sound level display, Noise dosimeter (NIOSH/OSHA compliant), Photo and video with noise overlay, Record measurement results, Data saving feature

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Access | $1.99 | per 7 days |
| Weekly pro access | $3.99 | per 7 days |
| Sound Level Meter (dB) PRO | $3.99 | per 7 days |
| Monthly pro access | $6.99 | per month |
| Yearly Access | $6.99 | per year |
| Decibel Meter & Dosimeter PRO | $6.99 | per month |
| Sound Meter & Dosimeter PRO | $12.99 | per year |
| Yearly pro access | $12.99 | per year |

**What reviewers like**

- 🚀 Great app
- 👍 Recommended
- 💡 Life Saving
- 👍 Good job
- 👍 Fantastic for visual documentation

**What reviewers complain about**

- 🐛 Bad app
- 🐛 Can't test
- 🐛 Subscription pop-up issues
- 🐛 Doesn't work unless you pay

**Reported bugs**

- Microphone issues
- Subscription paywall

**Requested features**

- Make more apps like this one


## Frequently asked questions

### Is OpeNoise free?

OpeNoise is free to download, with no in-app purchases.

### Is Decibel Meter · Sound Analyzer free?

Decibel Meter · Sound Analyzer is free to download, with in-app purchases available.

### Which has better reviews, OpeNoise or Decibel Meter · Sound Analyzer?

Decibel Meter · Sound Analyzer is rated higher. OpeNoise averages 4.0 out of 5 from 4 ratings, while Decibel Meter · Sound Analyzer averages 4.7 from 1.3K ratings.

### Do OpeNoise or Decibel Meter · Sound Analyzer have ads?

Neither OpeNoise nor Decibel Meter · Sound Analyzer shows ads.

### Which is updated more often, OpeNoise or Decibel Meter · Sound Analyzer?

OpeNoise ships an update every 7 months, and Decibel Meter · Sound Analyzer every 2 months. Most recently, OpeNoise was updated on September 21, 2026 and Decibel Meter · Sound Analyzer on September 20, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*