# AUFX:Push — Compressor

> Stereo dynamics processor with noise gate, compressor, expander, and limiter. (iPhone/iPad app by Kymatica AB.)

- Source: https://appshunter.io/ios/app/aufxpush/id958106165 (this page in markdown: same URL + `.md`)
- Developer: [Kymatica AB](https://appshunter.io/developer/522046659)
- Category: Music, Utilities
- Price: $4.99
- Rating: 4.30/5 from 32 App Store ratings · 38 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.0 · 5 MB
- Languages: American English
- Released: 2015-02-11
- Data updated: 2026-09-02
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/aufxpush/id958106165/reviews.md

## What is AUFX?

A highly tweakable stereo dynamics processor with noise gate, compressor/expander with external side-chain input, and limiter/clipper. From subtle compression, extreme pumping, to maximum loudness!

This app is part of the AUFX series, a collection of simple and powerful audio effect apps.

• High quality 32-bit DSP engine. 
• Compressor/expander with optional lookahead buffer.
• Allows negative ratios for pumping/cancellation effects.
• Hard or soft knee with adjustable radius.
• Built-in side-chain low/high cut filters with monitor toggle.
• External side-chain input through Inter-App Audio or Audiobus.
• Built-in noise gate.
• Brick-wall lookahead limiter.
• Hard/soft clipper.
• Supports "parallell compression".
• RMS/Peak envelope followers with attack, release and hold time.
• Switchable between Linear and Logarithmic mode.
• Automatic makeup gain.
• Stereo link on/off.
• Process hardware input/output, or other apps through Inter-App Audio or Audiobus (input/filter/output slots supported).
• Save, load and share user presets. 
• Supports Audiobus 2 state saving.
• Comes with several bundled presets. 
• Fully MIDI controllable, including Virtual MIDI. 
• Background Audio. 
• Record the result directly in app. 
• Email recordings or export to AudioShare audio document manager app. 
• Access user presets and recordings through iTunes File Sharing.

## Key features

- Stereo dynamics processor
- Noise gate
- Compressor/expander
- External side-chain input
- Lookahead limiter
- High quality 32-bit DSP

## Chart rankings

- #170 in Top Paid · Music (US App Store)

## Recent user reviews (10 of 38)

All indexed reviews: https://appshunter.io/ios/app/aufxpush/id958106165/reviews.md

### 5/5 — These still come in handy

*2022-05-02*

FLSM is not on the AU band wagon yet but I really like it. The IAA versions of the Kymatica fx are a perfect fit. They are stable, always work as expected and sound great.

### 5/5 — The one to use

*2022-02-07*

First I want to give kudos to the developer for this great app. I love it, along with his other effect apps and AUM.
What's wrong with people? These star ratings are to help others decide on an app to buy, NOT A WAY TO COMMUNICATE WITH THE DEVELOPER. It's simple, if you want help then send an email to the guy and he will help you. Ratings is not another customer support chat. The disgusting thing is that complainers NEVER update their rating if they find out their problem was not the fault of the app and probably they have the same problem with many other apps. We are in the middle of a decade long selfishness pandemic.

### 4/5 — Great Compressor, AUv3 Please!

*2021-11-23*

I was excited to see there was an update but a little sad to see it didn’t turnout to be AUv3... I love this plug in but would love it even more if I could use it more often.

**Developer response:** This is the old IAA effect app, released long before AUv3 even existed. An AUv3 version is coming soon!

### 1/5 — Dazmane

*2021-10-21*

All now still ain’t no auv3 kmt!!

**Developer response:** This is the old IAA effect app, released long before AUv3 even existed. An AUv3 version is coming soon!

### 4/5 — 🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨

*2021-07-29*

Can this app be converted into audio unit ?? With an update

**Developer response:** This is the old IAA effect app, released long before AUv3 even existed. An AUv3 version is coming soon!

### 5/5 — auv3

*2021-04-22*

auv3 any time soon ? please

**Developer response:** Yes, an AUv3 version is coming soon!

### 5/5 — Later: still my compressor of choice

*2021-01-20*

It is 2021 now, and AUFX:Push still sits at the end of most of my mixes despite the fact that it hasn’t been ported to AUv3 yet. Because it is simply that good: still easy to dial in precisely what I want, still more CPU efficient than many of the more expensive AU compressors I own, and still as reliable as the passage from day to night to day to night to day. 

Once Push is reincarnated as an AU, most of my other compressors will probably start to gather digital dust. Which is why I am here, compulsively checking the AppStore to see if it is ready yet. 

Prior review:
I use this on every single recording I make on my iPad because it is the only audio dynamics processor in its class--that would be the class of all incredibly great digital audio effects for iOS. Simple to use with a really nice graphical representation of the expansion/compression curve that changes in real time as you tweak its parameters. No guesswork at all! Extremely versatile: you can do light compression or expansion, and you can squish the daylights out of a signal and then boost it right back up until you get one of those waveforms that looks like a solid band from top to bottom and beginning to end without clipping--unless you want it--or distortion--unless you want it.

All the in between stuff works good too. And to top it off, the devs have managed to put a record function at the end of the chain that records what you hear. No clicks, drops, or weird EQ problems. This thing is as reliable as an old mule. Load it up and it placidly makes its way like you haven't asked for anything extraordinary. With Audiobus? While other apps go off and pout if you ask them to play nice with each other, this one waits patiently until the others get their issues worked out.

I would love to see a multi-band compression version of this app. But there is nothing missing as-is: if you are looking for a compressor for your iOS audio production chain, you have found it. I promise.

### 1/5 — No Manual? Sidechain unusable

*2020-11-14*

I can’t get the sidechain working in AUM. I’ve tried everything and since there is no manual I can’t use this app.

**Developer response:** Did you try customer support? Just send me an email and I'll try to help you.

### 3/5 — Not AUV3?

*2020-10-31*

From the dev that brought us AUM, I naively assumed these were all AUV.  Super surprised right now

**Developer response:** This is the old IAA effect app, released long before AUv3 (and AUM) even existed. An AUv3 version is coming soon!

### 3/5 — Nice sound

*2020-10-30*

Very interesting compressor with different operating modes. Not very comfortable ui, intuitively incomprehensible. Horizontal sliders are extremely uncomfortable for radical settings. In general, I would like to have a more user-friendly interface for work and support auv3! Now you can use only one instance for your project, as support is implemented only for inter-ap audio.

## Frequently asked questions about AUFX

### What does AUFX:Push do?

AUFX:Push is a sophisticated stereo dynamics processor that includes a noise gate, compressor/expander, and limiter. It allows for a wide spectrum of audio manipulation, from subtle compression to extreme pumping effects and maximum loudness, all powered by a high-quality 32-bit DSP engine.

### What are the key features of AUFX:Push?

Key features include a compressor/expander with optional lookahead, negative ratio support for unique effects, hard/soft knee options, built-in side-chain filters, external side-chain input via Inter-App Audio or Audiobus, a noise gate, a brick-wall lookahead limiter, and hard/soft clipping. It also supports parallel compression and MIDI control.

### How much does AUFX:Push cost?

Based on the provided information, AUFX:Push is a paid application and does not feature in-app purchases or ads, indicating a one-time purchase model.

### What devices is AUFX:Push compatible with?

The app supports background audio processing and can be used with Inter-App Audio or Audiobus, suggesting compatibility with iOS devices that support these audio routing technologies. It also allows for recording results directly within the app and exporting via email or AudioShare.

### What are common use cases for AUFX:Push?

Common use cases include achieving subtle compression for vocal warmth, creating extreme pumping effects for electronic music, maximizing loudness for mastering, gating unwanted noise from audio signals, and applying creative dynamic transformations using negative ratios or parallel compression.

## Version history (last 5 releases)

### 1.1.6 — 2020-06-28

Compatibility updates for modern iOS and larger iPads.

### 1.1.5 — 2020-02-11

- Fix side-chain connection issues.
- Fix sorting of presets.
- Updated to Audiobus SDK 3.0.11
- Various fixes

### 1.1.4 — 2018-08-30

Removed the IAA switcher panel, since using this sometimes crashed iOS system processes, rebooting the device! (Sudden black screen with spinning wheel). Also updated to Audiobus SDK 3.

### 1.1.3 — 2018-06-18

Bugfixes!

### 1.1.2 — 2016-02-04

• Less complex and more stable audio engine. Should get rid of crashes when connecting to host.
• Follow hardware/host samplerate without converting.
• Offline rendering from AudioShare now works again.
• Improved connection logic for side-chain input.
• Various tweaks and improvements.

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## More apps by Kymatica AB

- [AudioShare](https://appshunter.io/ios/app/audioshare/id543859300)
- [SECTOR](https://appshunter.io/ios/app/sector/id618095247)
- [The Oscillator](https://appshunter.io/ios/app/the-oscillator/id640819682)
- [AUFX:Space](https://appshunter.io/ios/app/aufxspace/id665650685)
- [AUFX:Dub](https://appshunter.io/ios/app/aufxdub/id678982701)
- [AUFX:PeakQ](https://appshunter.io/ios/app/aufxpeakq/id781852954)

All apps by Kymatica AB: https://appshunter.io/developer/522046659

## Related topics

[kymatica ab](https://appshunter.io/ios/topics/kymatica-ab)

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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 2026-09-02.*