# PAcalculate vs OpeNoise

The clearest difference is rating: PAcalculate at 5.0 against OpeNoise's 4.0. PAcalculate also leads on review sentiment (100% vs 86%). On price, ratings volume, update cadence and ads there is nothing between them.

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

PAcalculate holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 7 and 4 respectively. Written reviews point the same way: 100% of PAcalculate's written reviews are positive against 86% of OpeNoise's.

PAcalculate ships an update every 4 months, OpeNoise every 7 months. The most recent releases landed on September 13, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | PAcalculate | OpeNoise |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/pacalculate/id793460437/reviews)** | [4.0 (4 ratings)](https://appshunter.io/ios/app/openoise/id1387499991/reviews) |
| Number of ratings | **7** | 4 |
| Positive reviews | **100.0% of reviews** | 85.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 7 months |
| Monetization | Free | Free |
| Size | 3 MB | 18 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jose Brusi](https://appshunter.io/developer/793460440) | [Arpa Piemonte](https://appshunter.io/developer/1317255035) |

## What reviewers say

### PAcalculate

[App page](https://appshunter.io/ios/app/pacalculate/id793460437)

This app provides 28 calculators and reference information for professional audio sound reinforcement and lighting. It covers acoustics, audio electronics, cabling, and lighting calculations, making it a valuable tool for audio and lighting professionals.

**Highlights:** 28 calculators for pro-audio and lighting, Acoustics calculations (SPL, air absorption), Audio electronics calculations (dBu/dBV, Q/B/W), Cabling calculations (speaker cable loss), Lighting calculations (DMX, RGB/CMY), Reference info (pinouts, graphs)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is PAcalculate free?

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

### Is OpeNoise free?

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

### Which has better reviews, PAcalculate or OpeNoise?

PAcalculate is rated higher. PAcalculate averages 5.0 out of 5 from 7 ratings, while OpeNoise averages 4.0 from 4 ratings.

### Do PAcalculate or OpeNoise have ads?

Neither PAcalculate nor OpeNoise shows ads.

### Which is updated more often, PAcalculate or OpeNoise?

PAcalculate ships an update every 4 months, and OpeNoise every 7 months. Most recently, PAcalculate was updated on September 13, 2026 and OpeNoise on September 26, 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.*