# Flux Pro — AUv3 Modulation Envelope

> Multi-FX modulation plugin for dynamic sound sculpting and audio transformation. (iPhone/iPad app by Caelum Audio Ltd.)

- Source: https://appshunter.io/ios/app/flux-pro/id1611411940 (this page in markdown: same URL + `.md`)
- Developer: [Caelum Audio Ltd](https://appshunter.io/developer/1463219587)
- Category: Music
- Price: $11.99
- Rating: 5.00/5 from 27 App Store ratings · 7 written reviews indexed
- Age rating: 4+
- Requires: iOS 11.0 · 84 MB
- Released: 2023-03-15
- Data updated: 2026-09-11
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/flux-pro/id1611411940/reviews.md

## What is Flux Pro?

Flux Pro is a multi-FX modulation plugin that transforms your sounds into colourful, characterful and dynamic tracks.

Do you want to add graceful stereo waves to your keys, dirty pulsing side-chains to your bass, complex striking filters to your synths or noisy mechanical glitches to your drums? Modulation is king and we're offering you the throne.

There are 3 customisable graphs which can perfectly sculpt your sound. Simply set the depth of the controls in the 4 effects slots, from which you can use a variety of 10 modulation effects. Are you in a hurry and need movement quickly? Easily drag 1 of the 48 built-in shapes onto the graph for fast and effective modulation.

Key Features
- 3 custom graphs that can be assigned to any modulation parameter.
- 10 different effects in four effects slots.
- 48 drag-able shapes for fast and effective rhythmic sketches.
- MIDI Triggering; One-Shot & Retrigger.
- Output graphs as MIDI CC to control other plugins*
- Control Voltage graph output to send to external hardware.
- 115 presets to get you started.

* This feature is not supported by all DAWs.

Effects
Flux Pro has four effects slots from which you can use; Filter 1, Filter 2, Delay, Delay (Fixed), Width, Phaser, Chorus/Flanger, Rate Modulation, Ring Modulation and Utility.

Try shaping the Ring Modulation's frequency and harmonic amount to add mechanical flavours to your bass. Or maybe create some ethereal vocal delays by programming audio reverses an octave up with Fixed Delay's sample control. Then, apply a slow sine to the other Delay's time and feedback controls to create more movement.

Perhaps a mix approach, is your piano getting masked by a synth? Setup Flux Pro on the piano track with a boosted high shelf filter, some gentle chorus and additional width. Then, set Flux Pro's MIDI Input to the Synth, so that every time the synth plays the piano is given a little push to stand out in the mix.

Not good enough, want to get weird? Vary the formant filters' cutoff and resonance as if your music is flowing through someone's throat. Why not set the Fixed Delay to repeat every other bar at an octave lower so you can moodily duet with yourself on those lonely nights. Lastly, have quick oscillations of Rate Modulation to add percussive texture to your audio, and more importantly, save yourself the humiliation of recording a shaker track.

Flux Pro is both a stand-alone application as well as an AUv3 plugin, meaning it works within iOS and iPadOS hosts such as GarageBand.

## Key features

- 3 customizable modulation graphs
- 10 modulation effects
- 48 drag-able shapes
- MIDI Triggering & Output
- Control Voltage Output
- AUv3 plugin and standalone app

## Recent user reviews (7 of 7)

All indexed reviews: https://appshunter.io/ios/app/flux-pro/id1611411940/reviews.md

### 4/5 — Solid Set of Effects

*2025-02-02*

This is a very solid app. Great palette of effects and my biggest wish is that it worked on Mac as well. I’d buy all of these apps if they were cross-compatible.

### 5/5 — Oh flux, let me count the ways

*2024-11-15*

Seriously - this is the best filter/fx plugin for iOS out there. I am a big fan of the kilohearts “snapheap’ software on the Mac - but hands down Flux Pro is as good if not better. It’s the single plugin that makes me want to go entirely iOS vs OS. I LOVE IT SO MUCH! And it’s goofy, it’s adorable. Great great app.

### 5/5 — So far, it’s absolutely brilliant.

*2023-10-31*

I don’t think I’ve ever seen a plug-in like this. It’s absolutely incredible, and absolutely worth the money. I’m loving it so far and it’s incredibly useful.

### 5/5 — Worth it😌

*2023-08-02*

You can achieve some really cool dystopian robot like sounds with it if you pair with something like Zeeon synth. I wish this had a Manual though, sometimes I do not be knowing what I be doing in there, most of the time I only use the presets that come with the app which is plenty.

### 5/5 — Another home run

*2023-07-10*

Another great app from a great developer.

### 5/5 — Fantastic creative effects

*2023-07-03*

Just the presets alone synced to host tempo give some nice results on drum beats. It can range from subtle glitchy stutter variations to the rhythm, or go wild with filter modulations. There really is a lot of value here and very “tuneable”. Layering two instances of Flux in parallel (or in series) gets interesting. My impression with vocals, ambient, and synths is it can range from real pretty and dreamy, to nasty and stank. When your done, Schlap it or Smoov it. “Cool beans” as they say.

### 5/5 — hardky ever write a review.

*2023-03-09*

this us an awesome app for musical creativity. you wont regret buying this one trust me. this is a brilliant app and very well thought out.

## Frequently asked questions about Flux Pro

### What is Flux Pro?

Flux Pro is a multi-FX modulation plugin designed to add character and dynamics to your audio. It functions as both a standalone application and an AUv3 plugin within hosts like GarageBand.

### How does Flux Pro help sculpt sound?

Flux Pro allows you to sculpt sound using three customizable graphs that can be assigned to modulation parameters. You can also utilize 10 different effects and 48 built-in shapes for quick and effective modulation.

### Can Flux Pro control other plugins or hardware?

Yes, Flux Pro can output graphs as MIDI CC to control other plugins (though DAW support varies) and as Control Voltage to send signals to external hardware.

### What types of effects are available in Flux Pro?

Flux Pro offers a variety of effects including Filter 1, Filter 2, Delay, Fixed Delay, Width, Phaser, Chorus/Flanger, Rate Modulation, Ring Modulation, and Utility.

### What devices does Flux Pro support?

Flux Pro is supported on iPhone, iPad, and iPod touch devices.

### How often is Flux Pro updated?

Flux Pro was last updated on May 6, 2022, with version 1.0. Further update frequency is not specified.

### What is the price of Flux Pro?

Flux Pro is available for a one-time purchase of $11.99.

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

Flux Pro has an age rating of 4+, making it suitable for a wide range of users.

## Version history (last 1 release)

### 1.0 — 2022-05-06

No release notes.

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| --- | --- | --- | --- |
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## More apps by Caelum Audio Ltd

- [One Loop](https://appshunter.io/ios/app/one-loop/id1463219588)
- [Tape Cassette](https://appshunter.io/ios/app/tape-cassette/id1488648013)
- [Tape Cassette 2](https://appshunter.io/ios/app/tape-cassette-2/id1507434173)
- [Tape Pro](https://appshunter.io/ios/app/tape-pro/id1527986817)
- [Schlap AUv3](https://appshunter.io/ios/app/schlap-auv3/id1544325236)
- [Smoov AUv3](https://appshunter.io/ios/app/smoov-auv3/id1545474672)

All apps by Caelum Audio Ltd: https://appshunter.io/developer/1463219587

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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 2026-09-11.*