# SPLnWATCH (SPLnFFT extension) — Extension App of SPLnFFT

> Noise meter extension app with Apple Watch display and dose metering. (iPhone/iPad app by Fabien Lefebvre.)

- Source: https://appshunter.io/ios/app/splnwatch-splnfft-extension/id974003296 (this page in markdown: same URL + `.md`)
- Developer: [Fabien Lefebvre](https://appshunter.io/developer/338004167)
- Category: Utilities, Health & Fitness
- Price: $3.99
- Rating: 3.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.2 · 19 MB
- Languages: American English
- Released: 2015-04-25
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/splnwatch-splnfft-extension/id974003296/reviews.md

## What is SPLnWATCH (SPLnFFT extension)?

This is an extension for this other App: "SPLnFFT Noise Meter". This daugther App brings additional services that could hardly be packed in the mother App.

This App works better if you already own SPLnFFT. Indeed some important settings are shared (calibration of gains). If you do not own SPLnFFT, this App will run nevertheless, with this limitation: practical upper level will be limited to less than 100dB(A).

Main feature is to connect to an Apple Watch in order to display current noise level. On top of this, this App computes and records continuously statistics on audio samples. Thanks to the unique dosemetering feature, you will get notification on your Apple Watch when noise level becomes too high: a haptic alert will be triggered as soon as your noise exposition becomes worrying or critical (green/yellow/red flag).
An audio file - which covers the latest active period - can be exported by mail. Take care to disable recording when running this App for a long time: the used storage space can become very huge !

Note that the Watch is just a remote display: all computings are done by the iPhone. The microphone being used is that of the iPhone, not of the Watch (not possible as of today).

If you own "SPLnFFT Noise Meter", it must be installed on your device and run at least once to be identified, and share some information and settings. Most important setting to share is what is obtained when running the 'SET' procedure in 'Mic.' tab (see dedicated video on YouTube). Sharing of information between Apps is automatic.

## Key features

- Apple Watch noise level display
- Continuous statistics recording
- Dosemetering with haptic alerts
- Audio file export
- Shared settings with SPLnFFT Noise Meter

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/splnwatch-splnfft-extension/id974003296/reviews.md

### 3/5 — Not compelling yet

*2015-05-15*

I love the mother app and liked to give the developer the much deserved $3.99
The watch app however still requires the iPhone app to be launched. Saving me no time or adding value. 
(I was hoping it will use the microphone in the watch and I could take measurements quickly and from my wrist)

Lastly :  for a paid app I expect ads to be removed...please!

## Frequently asked questions about SPLnWATCH (SPLnFFT extension)

### Does SPLnWATCH have ads?

Yes, SPLnWATCH contains advertisements. This is indicated by the 'hasAds' flag being true in the app's data.

### What is the price of SPLnWATCH?

SPLnWATCH is a paid application, priced at $3.99. This information is based on the provided app data.

### What devices does SPLnWATCH support?

SPLnWATCH is supported on Apple Watch, iPhone, iPad, and iPod devices, as indicated by the 'supportedDevices' field.

### How often is SPLnWATCH updated?

The latest version of SPLnWATCH is 2.4, which was last updated on February 20, 2022. This suggests an update frequency of approximately once every few years.

### What is the age rating for SPLnWATCH?

SPLnWATCH has an age rating of 4+, meaning it is suitable for children aged 4 and above. This is based on the 'ageRating' field.

### Can SPLnWATCH be used without SPLnFFT Noise Meter?

Yes, SPLnWATCH can run without SPLnFFT Noise Meter, but its practical upper noise level will be limited to less than 100dB(A). For full functionality, owning and running SPLnFFT is recommended.

### How does the Apple Watch integration work?

The Apple Watch acts as a remote display for the current noise level measured by the iPhone's microphone. All computations are performed on the iPhone.

### What user sentiment is reflected in the rating?

The app has a rating of 3.0 stars from 1 rating. This single rating suggests limited user feedback is available to gauge overall sentiment.

## Version history (last 5 releases)

### 2.4 — 2022-02-20

Re-compiled for latest iOS. Better handling of various screen sizes and shapes.

### 2.3 — 2020-02-01

Optimized for latest iPhone (11) and iOS (13). Dropping old versions of watchOS (<5.1).

### 2.2 — 2018-05-29

Updated to support latest Dropbox API, and watchOS.
Support of watchOS 1 is dropped: watch App is now natively running on Watch.

### 2.1 — 2017-05-04

Minor update

### 2.0 — 2017-05-01

New SDK being used for Dropbox since previous one will soon be dropped. This should be transparent to end users. Except that initial association has to be re-run: 'link to Dropbox'.

## Apps similar to SPLnWATCH (SPLnFFT extension)

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Magnetic Storms](https://appshunter.io/ios/app/magnetic-storms/id575956246) | 4.3 (19) | Free | Utilities |
| [Noise Patrol App](https://appshunter.io/ios/app/noise-patrol-app/id1101685127) | — | Free | Utilities |
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| [Fostex TM Sound Support](https://appshunter.io/ios/app/fostex-tm-sound-support/id1480797748) | 2.0 (4) | 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 Fabien Lefebvre

- [Speaker Meter](https://appshunter.io/ios/app/speaker-meter/id338004164)
- [Diapason Audio Generator](https://appshunter.io/ios/app/diapason-audio-generator/id352091730)
- [SPLnFFT Noise Meter](https://appshunter.io/ios/app/splnfft-noise-meter/id355396114)
- [logSPL](https://appshunter.io/ios/app/logspl/id491999427)
- [AeroGoto](https://appshunter.io/ios/app/aerogoto/id542983237)
- [BetonMix (concrete calculator)](https://appshunter.io/ios/app/betonmix-concrete-calculator/id872695788)

All apps by Fabien Lefebvre: https://appshunter.io/developer/338004167

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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 2026-06-10.*