# OpeNoise vs SmarterNoise Pro

The clearest difference is review sentiment: OpeNoise at 86% against SmarterNoise Pro's 29%. OpeNoise also leads on in-app purchases (none vs 4). SmarterNoise Pro's advantage is rating (4.4 vs 4.0) and update cadence (monthly vs every 7 months). On price, ads and device support there is nothing between them.

Both are free to download. SmarterNoise Pro sells 4 one-off in-app purchases. OpeNoise asks for nothing beyond the download.

SmarterNoise Pro holds the better App Store score, 4.4 against 4.0. That said, the two scores are not equally well evidenced: SmarterNoise Pro has 31 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 29% of SmarterNoise Pro'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, SmarterNoise Pro monthly. The most recent releases landed on October 13, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | OpeNoise | SmarterNoise Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/openoise/id1387499991/reviews) | **[4.4 (31 ratings)](https://appshunter.io/ios/app/smarternoise-pro/id1466745030/reviews)** |
| Number of ratings | 4 | **31** |
| Positive reviews | **85.7% of reviews** | 28.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 12 MB | 24 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Agenzia Regionale per la Protezione Ambientale del Piemonte](https://appshunter.io/developer/1317255035) | [Johan Rogard](https://appshunter.io/developer/1384299041) |

## 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


### SmarterNoise Pro

[App page](https://appshunter.io/ios/app/smarternoise-pro/id1466745030)

This advanced sound level meter app offers detailed audio analysis with features like frequency spectrum display and data export. It allows for precise sound measurements in both video and audio recording modes, with options for A-, C-, or no weighting.

**Highlights:** Sound level measurement in video/audio modes, Frequency spectrum display, Export measurement data (CSV), Sound level activated audio recording, Calibration tool, Full HD video recording (paid)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Camera upgrade | $0.99 | one-time |
| Frequency spectrum indicator | $1.99 | one-time |
| Video and audio recording | $1.99 | one-time |
| Spectrogram display | $1.99 | one-time |


## Frequently asked questions

### Is OpeNoise free?

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

### Is SmarterNoise Pro free?

SmarterNoise Pro is free to download, with in-app purchases available.

### Which has better reviews, OpeNoise or SmarterNoise Pro?

SmarterNoise Pro is rated higher. OpeNoise averages 4.0 out of 5 from 4 ratings, while SmarterNoise Pro averages 4.4 from 31 ratings.

### Do OpeNoise or SmarterNoise Pro have ads?

Neither OpeNoise nor SmarterNoise Pro shows ads.

### Which is updated more often, OpeNoise or SmarterNoise Pro?

OpeNoise ships an update every 7 months, and SmarterNoise Pro monthly. Most recently, OpeNoise was updated on October 13, 2026 and SmarterNoise Pro on September 22, 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.*