# OpeNoise vs Noise Calc

The clearest difference is rating: OpeNoise at 4.0 against Noise Calc's 1.0. OpeNoise also leads on ratings volume (4 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

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

OpeNoise holds the better App Store score, 4.0 against 1.0. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

OpeNoise ships an update every 7 months, Noise Calc every 11 months. The most recent releases landed on September 21, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | OpeNoise | Noise Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/openoise/id1387499991/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/noise-calc/id1556882174/reviews) |
| Number of ratings | **4** | 1 |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 11 months |
| Monetization | Free | Free |
| Size | 18 MB | 39 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Arpa Piemonte](https://appshunter.io/developer/1317255035) | [Lorenzo Rizzi](https://appshunter.io/developer/856070642) |

## 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


### Noise Calc

[App page](https://appshunter.io/ios/app/noise-calc/id1556882174)

This calculator estimates outdoor and semi-reverberant noise levels. It's designed for acoustic technicians and professionals dealing with machine noise, offering tools for logarithmic summation and difference, sound pressure attenuation, and noise reduction from barriers.

**Highlights:** Logarithmic summation of decibels, Logarithmic difference in decibels, Sound pressure attenuation with distance, Free-field sound propagation, Sound-insulating barrier noise reduction, Outdoor machinery noise compliance estimation

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

**In-app purchases:** none


## Frequently asked questions

### Is OpeNoise free?

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

### Is Noise Calc free?

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

### Which has better reviews, OpeNoise or Noise Calc?

OpeNoise is rated higher. OpeNoise averages 4.0 out of 5 from 4 ratings, while Noise Calc averages 1.0 from 1 ratings.

### Do OpeNoise or Noise Calc have ads?

Neither OpeNoise nor Noise Calc shows ads.

### Which is updated more often, OpeNoise or Noise Calc?

OpeNoise ships an update every 7 months, and Noise Calc every 11 months. Most recently, OpeNoise was updated on September 21, 2026 and Noise Calc on September 24, 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.*