# Brusfri — Noise reduction tool

> Advanced audio noise reduction tool for cleaning recordings with a simple interface. (iPhone/iPad app by Klevgrand Produkter AB.)

- Source: https://appshunter.io/ios/app/brusfri/id1289165912 (this page in markdown: same URL + `.md`)
- Developer: [Klevgrand Produkter AB](https://appshunter.io/developer/1118902192)
- Category: Music
- Price: $15.99
- Rating: 4.00/5 from 81 App Store ratings · 103 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 41 MB
- Languages: American English
- Released: 2017-10-11
- Data updated: 2026-09-09
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/brusfri/id1289165912/reviews.md

## What is Brusfri?

Brusfri* is a highly advanced audio noise reducer, packed into a simple and straight-forward interface. It is very well suited for cleaning up noisy audio recordings, while retaining sound quality. Unlike many other noise reducers on the market, Brusfri doesn't mess with audio phasing to suppress noise (a technique that often comes with audible side effects). Instead, multiple fine-tuned gates are used to silence unwanted noise.

Brusfri can also be used as a AUv3 plug-in in compatible hosts, for example in GarageBand.

*Brusfri means "Noise free" in Swedish.

Here are some examples of sound conditions that Brusfri handles well:

* Guitar amp
* Noisy vintage gear
* Boosted pre-amp
* iPhone/iPad and external mic hiss
* Room reverb removal
* Fan noise
* Background ambiance
* Mains hum / Electric hum

Usage

In short, press “Learn” during a couple of seconds of isolated noise to create a "profile" for noise. This may be all you need to do.

Brusfri can be used in two ways, either standalone or as a AUv3 plug-in.

Standalone
Import the audio, either by extracting audio from a video, by importing from iTunes, or by using the “Open In…” option in any other app that can export audio. Press and hold the Learn button (the ear) while playing unwanted noise. (It’s important that the Ear is only fed with isolated noise). When Learn is released, Brusfri will start reducing noise. 

AUv3 plug-in
Open Brusfri in any AUv3 compatible host.
Find a region in the recording that only contains noise and play it. 
Tap and hold the “LEARN” button for a short while (a second will be enough). When the LEARN button is released, Brusfri will start reducing noise.

There are a bunch of parameters available that affect the noise reduction algorithm:

ATK / THRS / REL (Attack Time / Threshold / Release Time)
Threshold - basically determines how much noise to be removed. A lower value means more reduction.
Attack and Release sets the time it will take for the reducer to start working.

LOOKAHEAD
Makes transient processing a bit smoother.

EDGE
Controls the reduction aggressivity. A lower value gives a smoother reduction.

HPF
Reduces low frequencies.

HIGH
Compensates high frequencies by boosting them.

MIX
Mixes between dry and noise reduced signal.

NOTE! Brusfri is CPU intensive and iPhone 6 / iPad AIR 2 or better is recommended. When used as an AUv3 plug-in, we highly recommend freezing/bouncing tracks to reduce CPU usage.

## Key features

- Advanced audio noise reduction
- Simple and straightforward interface
- Retains sound quality
- Uses fine-tuned gates, not phasing
- Standalone and AUv3 plugin modes
- Adjustable parameters (Threshold, Attack, Release, etc.)

## What do users think of Brusfri?

Overall sentiment: mixed

**Pros**

- ✨ Excellent noise reduction quality and effectiveness
- 🎯 Simple and intuitive user interface
- ⚡ Fast processing and quick results
- 🎬 Works well as AUv3 plugin in DAWs and video editors
- 🎙️ Preserves audio quality and transients
- 🔧 Effective threshold and release controls
- 📱 Lightweight and responsive on iPad
- 🎵 Great for vocals, podcasts, and music recording
- 💰 Good value for price (when working properly)

**Cons**

- 🐛 Frequent crashes and freezing issues
- 📁 Cumbersome file import/export workflow
- ⚠️ Inconsistent performance across devices
- 🔄 Requires multiple attempts to load files
- 💾 Takes up excessive storage space
- 🎚️ Limited customization options
- 📊 No zoom or timeline visibility features
- 🚫 Fails with heavy background noise
- ⏱️ Doesn't display time markers during playback

**Commonly reported bugs**

- App crashes on file import
- Audio files fail to play after import
- Export/rendering freezes and crashes
- Progress bar doesn't move during playback
- App won't open or launch
- Crashes when used on 25+ tracks in Logic Pro
- Learn button gets stuck
- Audio cuts and stutters during playback
- Distortion when increasing volume
- Incompatibility with iOS 13+ workflows
- Not recognized as available option in share menu
- Demo mode reversion after update
- Dial controls unresponsive or confusing
- File import from Photos app removed in update

**Most requested features**

- Mac OS version for GarageBand compatibility
- Direct audio file import without video requirement
- Zoom functionality for long audio tracks
- Time markers and timeline display
- Save and reuse noise profiles across devices
- Voice enhancement and audio boost features
- Recording function built into app
- Multiple denoise algorithm options
- Direct import from Photos app
- Ability to delete imported files from app storage
- AB comparison view for pre/post processing
- Graphical frequency response visualization
- Live sound/real-time processing mode
- iOS 12 compatibility

## Recent user reviews (10 of 103)

All indexed reviews: https://appshunter.io/ios/app/brusfri/id1289165912/reviews.md

### 4/5 — It Works

*2026-07-07*

You have to find a quiet spot in your audio that has some noise to get the most from this app, but when it works right it can easily fix any unwanted noise you need removed.

### 5/5 — Excellence

*2026-01-07*

It’s not perfect, but way better than I can do in 30 seconds. Much better processing, albeit destructive, for demos than Spire on its own. Spire -> Brusfri is pretty quick and great!

### 5/5 — Excelente

*2025-02-03*

En verdad elimina el ruido de fondo o hiss de las grabaciones. Pero no hace milagros: Cuando el ruido ambiente es muy intenso, el sonido que sí intentas conservar pierde detalle y brillo. Así que recomiendo tener eso en cuenta: Grabar a un buen volumen en relación con el hiss o ruido a ambiente para obtener mejores resultados. Es una excelente herramienta 👌

### 5/5 — Perfect with Logic Pro for iPad

*2024-09-27*

Works like a charm. Only issue is it fails to load or crashes Logic if used on too many tracks (25+)

### 1/5 — 返金して欲しい。

*2024-03-20*

購入したのですが、全く使えませんでした。

### 5/5 — ABSOLUTE NECESSITY!

*2024-02-14*

This app has been phenomenal and I use it on many tracks in any project I and working on.  It quickly and easily analyzes the sound then sets noise gate type settings and can really improve the quality of any audio track I find and you can tweak the arrack release and threshold to your liking. I have found nothing that even comes close for iPad.  This thing cleans up messy audio tracks fantastically and is a vital audio unit and in my list of top ten most used AUv3.  I don't understand the poor reviews, this thing is magic and is so useful!

### 3/5 — ホワイトノイズ

*2024-01-02*

良い点:完全に綺麗に除去することはできませんでしたが（理由は、まだまだ私が技術不足だからです）ほぼ目立たないレベルまで調整出来たかな？と思います。

改善して欲しい点:
１.マニュアルがわかりづらい事
使い方は簡単で、マニュアルを見る必要もないのだろうと思いますが、やはり、1番最初に使う時はわからないので、私は、マニュアルをきちんと読みたいタイプです。
それを踏まえた上で書きます。

pdfで作られたフルマニュアルはiPhoneから翻訳もままならない。一つ一つコピーペーストしながら翻訳したが、いまいちわかりづらいです。
「ソフト名+使い方」で検索すると、個人の有志の方が日本語で解説してくれているサイトとYouTubeがヒットするのでそちらを見るのがわかりやすかったです。

２.ルマフュージョンでのバグ？
他のレビューでもいわれている通り、ルマフュージョンでプラグインとして使用する際に、設定の調整ができません。
改善していただけるとすごく便利なので、ご検討いただけると幸いです。こちらが改善されましたら⭐︎の数を上げます。

### 4/5 — It just doesn't work well. I hope it takes a new and improved step forward in all respects

*2023-07-04*

The app needs to be updated and improvement and add a custom voice enhancement button to better sound more masculine and appropriate. And Increase the volume without increasing the distortions, It's one of the biggest annoying problems I've encountered using it and I hope you fix it. And denose improved to the best site like adobe's new site, it works like crazy, you feel the ultimate improvement in sound, like you bought a mic for $300. I hope that a new button will be added, this new technology and technology will be added to the application and the old technology will also be in place. A pleasure to use, which means you have complete freedom to choose any of them together 1 - Old Denoise 2 - New Denoise 3 - Audio Boost button The adobe site: Adobe enhance

Edit: Now, after testing the app, I'm finding a glitch in converting audio to audio without distortion. The sound does not match the original, wav sound and most types of sound, the sound cuts and plays and the sound cuts and plays until the end distance. I hope this problem will be resolved.

### 4/5 — It works

*2023-05-21*

Very good app.
Thumbs up from me.
It simply works.

### 5/5 — Far Better than Expected

*2023-03-22*

I’m pretty chuffed that this quality of noise reduction is available on iOS. The app works perfectly on my m1 iPad Pro.

## Frequently asked questions about Brusfri

### What does Brusfri do?

Brusfri is an advanced audio noise reducer designed to clean up noisy audio recordings while preserving sound quality. It uses a unique method of multiple fine-tuned gates to silence unwanted noise, avoiding the audible side effects often associated with phasing techniques found in other noise reducers.

### How do I use Brusfri to reduce noise?

To reduce noise, you first need to create a noise profile. In standalone mode or as an AUv3 plugin, play a section of isolated noise and press and hold the 'Learn' button. Once the profile is created, Brusfri will automatically start reducing noise. You can further refine the reduction using various parameters like Threshold, Attack, and Release.

### Can Brusfri be used as a plugin?

Yes, Brusfri can be used as an AUv3 plugin in compatible hosts such as GarageBand. This allows you to integrate its noise reduction capabilities directly into your existing audio production workflow.

### What are the system requirements for Brusfri?

Brusfri is CPU intensive. It is recommended to use it on an iPhone 6 / iPad AIR 2 or better. When used as an AUv3 plugin, freezing or bouncing tracks is highly recommended to reduce CPU usage.

### What types of noise can Brusfri handle?

Brusfri is effective at handling a variety of noise conditions, including guitar amp noise, noisy vintage gear, boosted pre-amp hiss, microphone hiss from iPhones/iPads and external mics, room reverb, fan noise, background ambiance, and mains or electric hum.

## Version history (last 5 releases)

### 1.2.1 — 2021-04-29

- AUv3 state save/restore bug fixed.
- Fixed an issue where a couple of user interface components wouldn’t always react on automation changes.
- "Export" replaced "save" and "open in" buttons.
- Minor graphical tweaks.

### 1.2.0 — 2021-04-06

Updated AUv3 user interface.
New gain control.
Minor processing bugs fixed.
Performance improvements.

### 1.1.5 — 2021-01-31

Import videos option.
Several minor fixes.

### 1.1.4 — 2020-12-08

- Standalone app fixes, with project manager.
- Mix dry/wet parameter.
- Lookahead on/off parameter.
- Performance optimizations.
- Minor fixes.

### 1.1.0 — 2017-12-19

The standalone version  now can import, process and export audio.

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All apps by Klevgrand Produkter AB: https://appshunter.io/developer/1118902192

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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 2026-09-09.*