# SmarterNoise Pro — Video recording sound analyzer

> Advanced sound level meter with video recording, spectrum analysis, and data export. (iPhone/iPad app by Johan Rogard.)

- Source: https://appshunter.io/ios/app/smarternoise-pro/id1466745030 (this page in markdown: same URL + `.md`)
- Developer: [Johan Rogard](https://appshunter.io/developer/1384299041)
- Category: Utilities, Photo & Video
- Price: Free with in-app purchases
- Rating: 4.40/5 from 31 App Store ratings · 7 written reviews indexed
- Age rating: 12+
- Requires: iOS 12.0 · 24 MB
- Languages: American English, Arabic, Dutch, Finnish, French (France), German (Germany), Hindi, Indonesian, Italian, Japanese and 6 more
- Released: 2019-07-27
- Data updated: 2026-07-25
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/smarternoise-pro/id1466745030/reviews.md

## What is SmarterNoise Pro?

SmarterNoise Pro is the most advanced edition of the SmarterNoise recording sound level meters. SmarterNoise Pro edition is developed especially with more advanced measurements in mind, and includes many requested features such as a frequency spectrum display, export of measurement data, A-, C- or no weighting for sound level measurement, and full screen audio mode. SmarterNoise Pro edition does not contain any advertising, and performs accurately and fast.


Features:

• Sound level measurement in video mode

• Sound level measurement in audio mode

• Sound meter snapshot camera

• Record video and audio files (paid function)

• Recording timer

• Sound level activated audio recording

• Frequency spectrum display (paid function)

• Peak frequency detection

• A-, C- or no frequency weighting

• Export of measurement data in CSV format

• Full HD (paid function), HD and VGA video resolution

• Three video quality settings

• Archive for saved files

• Sharing of saved files

• Calibration

• Save location of measurement (optional)

• Time and date

• Continuous Leq, LAeq, LCeq value 

• 10 second sound level average (Leq, LAeq, LCeq)

• 60 second sound level average (Leq, LAeq, LCeq)

• Maximum and minimum decibel level


About decibels and sound level measurement

The unit for measuring sound is called a decibel. Because the decibel scale is logarithmic, a sound with an intensity that is twice that of a reference sound corresponds to an increase of about 3 decibels. The reference point of 0 decibel is set at the intensity of the least perceptible sound, the threshold of hearing. On such a scale a 10-decibel sound is 10 times the intensity of the reference sound. Highlighting this is important as already a few decibels higher or lower makes a noticeable difference in how noise is perceived.

The preferred method to describe sound levels that vary over time, resulting in a single decibel value measuring the total sound energy over the period, is called Leq. It is however common practice to measure sound levels using A-weighting, which attenuates lower and higher frequencies that the average person cannot hear. In this case the value is called LAeq.

A- and C-weighting

The A-weighting is a standard, commonly used filter that attempts to alter the measured sound pressure levels to more closely match the perception of the human ear. A-weighting makes the sound level meter less sensitive to very high (over 8000 Hz) and low frequencies (below 1000 Hz).
C-weighting also attenuates low and high frequencies, but the attenuation of low frequencies is much less severe compared to A-weighting. 

Calibrate:

Calibrate the application using the calibration tool found in the settings menu. Phones and their components vary in quality and setup so you need to calibrate the app in order for the results to be relatively comparable. One suggestion is that you close the window and door to your bedroom or bathroom, turn off appliances, and once its very quiet calibrate the app so the reading is about 30 decibel.

## Key features

- 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)

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

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


## Recent user reviews (7 of 7)

All indexed reviews: https://appshunter.io/ios/app/smarternoise-pro/id1466745030/reviews.md

### 2/5 — Time clock is off in graph display

*2025-08-04, version 1.025*

Strange bug when you enable Alternative Time Display to enable time clock in graph display. It shows the time under the graph from the moment you press stop, not from the time you press start.

So the time under the graph is always offset by the time recorded. 

For example, you start recording at 9:00pm and stop at 9:05pm, the time under the graph shows you that you started recording at 9:05 pm and ended at 9:10pm. If you record for a few hours, same thing. 

As of now, it’s a useless feature. My guess is the graph uses stop time as an input instead of start time. 

This has been mentioned before in the review. Still not fixed for Apple devices.

Also, location address changes to neighbouring buildings, it would be nice to input your own address.

### 4/5 — Great for noise measuring

*2024-12-08*

This is one of the better noise measuring apps that does continuous measuring and shows the results on a graph. The graph image or results ( in csv format) can be exported. Measurements can be saved for viewing or exporting later on. The only issue which may be intentional is when Calibrating it doesn't member the adjusted setting next time the app is used so have to calibrate again. The option to save the Calibration setting might be useful. However still a very good app.

### 1/5 — Clock not showing correctly in recordings

*2024-05-28, version 1.021*

Accurate time is very important when using these recordings as evidence. Time showing on recordings is hours out.

### 3/5 — Great app ruined by incredibly inconvenient sharing feature

*2024-01-20*

I don’t understand how they could’ve put this much work into making such a great app, and then made it virtually impossible to get the videos off your phone, by requiring you to export them one at a time through a sharing feature that requires multiple clicks per video. i’ve got about 50 videos saved and it’s a nightmare tried to get them off the phone. They could easily have implemented iTunes file sharing so it was possible to just download the videos from the app through iTunes, or save them to the camera roll, or you let you select a bunch of them and upload to dropbox or save to iCloud, and they didn’t bother to do any of that. It would’ve been a five star app if not for that, but 1-by-1 export via a clunky “Sharing“ interface is such a major hassle and such an obvious missing feature that I’m deducting two stars for it.

### 1/5 — Very little playback volume

*2022-09-10*

Very little playback volume

### 3/5 — Tested at 55 and over community in South Texas

*2022-06-27*

Wish it measured and documented inaudible part of the spectrum

### 5/5 — Cool app

*2021-08-09*

Great for checking to see if I’m out of tune

**Developer response:** Thank you for the review and support

## Frequently asked questions about SmarterNoise Pro

### What is SmarterNoise Pro?

SmarterNoise Pro is an advanced sound level meter application that provides detailed audio analysis. It includes features like a frequency spectrum display, data export, and precise sound measurements for both video and audio recording.

### Does SmarterNoise Pro have ads?

No, SmarterNoise Pro does not contain any advertising. The app is designed to perform accurately and quickly without interruptions from advertisements.

### What are the paid features in SmarterNoise Pro?

The paid functions in SmarterNoise Pro include recording video and audio files, accessing the frequency spectrum display, and recording in Full HD video resolution. These features offer enhanced capabilities for users.

### How accurate are the sound measurements in SmarterNoise Pro?

SmarterNoise Pro performs accurately and fast. For the most comparable results, users are advised to calibrate the application using the tool found in the settings menu, as phone components vary in quality.

### Can I export my measurement data from SmarterNoise Pro?

Yes, SmarterNoise Pro allows for the export of measurement data in CSV format. This feature is particularly useful for users who need to analyze or archive their sound level readings.

### What devices is SmarterNoise Pro available on?

SmarterNoise Pro is available for iPhone and iPod devices. It is designed to run on these iOS platforms.

### How often is SmarterNoise Pro updated?

The latest version of SmarterNoise Pro is 1.025, and it was last updated on July 24, 2025. This indicates regular maintenance and potential feature additions.

### What is the age rating for SmarterNoise Pro?

SmarterNoise Pro has an age rating of 12+. This suggests that the content and complexity of the app are considered appropriate for users aged 12 and above.

## Version history (last 5 releases)

### 1.028 — 2026-07-13

Improved handling of errors in video recording.

### 1.027 — 2026-06-25

Fixed a crash that occurred on some iPhone models when stopping video recording.

### 1.026 — 2026-06-15

- On audio recordings, the spectrum display now updates when playback is paused and the playback position is changed.
- The spectrum graph display can now be zoomed by pinching and scrolled by dragging.
- Fixed the seek sliders not working on iOS 26.
- Added Polish translation.

### 1.025 — 2025-07-24

- Added Dutch translation.
- Fixed fullscreen mode on iPhone 16 models.

### 1.024 — 2025-06-21

- Added a new display type to the live decibel graph: one-second boxes with optional minimum and maximum level display.
- Added a setting for automatically starting measurement, without having to press the 'play'-button.
- Improved synchronization of saved audio and the decibel graph.

## Apps similar to SmarterNoise Pro

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Decibel X:dB Sound Level Meter](https://appshunter.io/ios/app/decibel-xdb-sound-level-meter/id448155923) | 4.7 (155,562) | Free | Utilities |
| [Decibel X PRO: dBA Noise Meter](https://appshunter.io/ios/app/decibel-x-pro-dba-noise-meter/id1257651611) | 4.7 (6,850) | $69.99 | Utilities |
| [Decibel : dB sound level meter](https://appshunter.io/ios/app/decibel-db-sound-level-meter/id1227650795) | 4.6 (36,014) | Free | Utilities |
| [Decibel Meter - Sound Analyzer](https://appshunter.io/ios/app/decibel-meter-sound-analyzer/id1579747105) | 3.7 (36) | Free | Utilities |
| [Noise Guru: Decibel Meter](https://appshunter.io/ios/app/noise-guru-decibel-meter/id6444836813) | 4.6 (299) | Free | Utilities |
| [dB Meter & Spectrum Analyzer](https://appshunter.io/ios/app/db-meter-and-spectrum-analyzer/id733773616) | 4.7 (858) | $29.99 | Utilities |

## More apps by Johan Rogard

- [SmarterNoise](https://appshunter.io/ios/app/smarternoise/id1384299042)

All apps by Johan Rogard: https://appshunter.io/developer/1384299041

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-25.*