iOS Musician Apps (292) Supported Technologies is Audio Unit (AU), Type is Effect

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Visual Compressor is a 4 band compressor/expander which has the ability to analyse audio in real time giving an accurate and reliable spectrum representation of your signal as well as visual feedback of compression or expansion levels.  It's uses range from final mastering of songs to dynamic manipulation and EQing of drum tracks.

Price $8.99
Author 4Pockets.com
Type Effect
Effect type Compressor, Limiter, Gate
Supports Audio Unit (AU)
Rating total: 5 (2), current: 5 (2)
Released 08/13/2019
Updated 09/03/2025

ToneBoosters Reverb is a studio-quality reverberation plug-in.

Price $8.99
Author ToneBoosters
Type Effect
Effect type Reverb, Delay, Echo
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 4.77778 (54), current: 4.77778 (54)
Released 08/13/2019
Updated 05/30/2026

Create out of this world ambiance with Blackhole, a reverb effect as big as the cosmos.

Price $9.99
Author Eventide
Type Effect
Effect type Reverb, Delay, Echo
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 4.625 (56), current: 4.625 (56)
Released 08/08/2019
Updated 03/06/2024

This application is simply a container for the Audio Unit and also serves as the documentation for the AU. PhaseDelayArray is a bit of a strange effect. O.K, so, what is it? PhaseDelayArray has three effect units chained together in an interesting configuration, and one of these units is just a little bit twisted.

Price Free
Author Neon Silicon
Type Effect, Tool
Effect type Other
Supports Audio Unit (AU)
Rating total: 4.45455 (44), current: 4.45455 (44)
Released 08/02/2019
Updated 04/14/2021

JAX Stereo Tool is a visual Audio Unit plugin for manipulating the stereo image of digital audio.

Price $9.99
Author Jens Guell
Type Effect
Effect type Stereo, Pan effects
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 4.57692 (26), current: 4.57692 (26)
Released 07/31/2019
Updated 07/25/2024

ToneBoosters Equalizer is a dynamic equalizer plug-in.

Price $9.99
Author ToneBoosters
Type Effect
Effect type Equalizer, Filter
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 4.63636 (66), current: 4.63636 (66)
Released 07/30/2019
Updated 05/28/2026

The MODEL ONE is a selected, fine-tuned general purpose (transistor ladder model) filter with the ability of strong self oscillation. The cutoff slope is approximately 24dB. It can be switched to low pass or high pass processing mode.

Price $9.99
Author Jens Guell
Type Effect
Effect type Equalizer, Filter
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 5 (13), current: 5 (13)
Released 07/28/2019
Updated 02/20/2023

Visual Reverb is a plate reverb with multi-band EQ and the ability to analyse audio in real time giving a spectrum representation of your signal flow.

Price $7.99
Author 4Pockets.com
Type Effect
Effect type Reverb, Delay, Echo
Supports Audio Unit (AU)
Rating total: 5 (1), current: 5 (1)
Released 07/26/2019
Updated 09/03/2025

Velocity Filter is the way to make all your synthesizer patches respond to MIDI velocity in a natural and musical way.

Price $2.99
Author Blue Mangoo Consulting Company Limited
Type Effect, Tool
Supports Audiobus, Audio Unit (AU)
Rating total: 5 (6), current: 5 (6)
Released 07/24/2019
Updated 11/17/2020

Time Machine is a plugin that allows you to go back to the days of vinyl and tube amplification. 

Price $9.99
Author 4Pockets.com
Type Effect
Effect type Other
Supports Audio Unit (AU)
Rating total: 4.21429 (14), current: 4.21429 (14)
Released 07/24/2019
Updated 09/01/2025

The JAF Collection is an exciting set of digital modeled classic analog synthesizer filters (VCFs) for iOS.

Price $29.99
Author Jens Guell
Type Effect
Effect type Equalizer, Filter
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 4.9 (20), current: 4.9 (20)
Released 07/24/2019
Updated 02/20/2023

Visual EQ Console is a multi-band EQ console with the ability to analyse audio in real time giving a spectrum representation of the frequency response. 

Price $8.99
Author 4Pockets.com
Type Effect
Effect type Equalizer, Filter
Supports Audio Unit (AU)
Rating total: 4.14286 (21), current: 4.14286 (21)
Released 06/23/2019
Updated 09/03/2025

FabFilter Pro-L 2 is a feature-packed true peak limiter, suitable for transparent mastering as well as single instrument limiting.

Price $39.99
Author FabFilter
Type Effect
Effect type Compressor, Limiter, Gate
Supports Audio Unit (AU)
Rating total: 4.89473 (19), current: 4.89473 (19)
Released 06/21/2019
Updated 12/20/2023

FabFilter Pro-DS is a professional de-essing plug-in. With its 'Single Vocal' detection algorithm, it attenuates sibilance in vocal recordings.

Price $29.99
Author FabFilter
Type Effect
Effect type Vocal effects
Supports Audio Unit (AU)
Rating total: 4.93333 (15), current: 4.93333 (15)
Released 06/21/2019
Updated 12/20/2023

FabFilter Pro-G is a gate/expander plug-in for mixing and mastering purposes, with flexible side chain options.

Price $29.99
Author FabFilter
Type Effect
Effect type Compressor, Limiter, Gate, Other
Supports Audio Unit (AU)
Rating total: 5 (16), current: 5 (16)
Released 06/21/2019
Updated 12/20/2023

FabFilter Pro-MB is a multiband dynamics plug-in featuring an optimized workflow: up to six compression/expansion bands can be placed freely anywhere in the spectrum.

Price $39.99
Author FabFilter
Type Effect
Effect type Equalizer, Filter
Supports Audio Unit (AU)
Rating total: 4.7619 (21), current: 4.7619 (21)
Released 06/21/2019
Updated 12/20/2023

FabFilter Pro-R is an algorithmic reverb plug-in with natural sound and intuitive controls.

Price $39.99
Author FabFilter
Type Effect
Effect type Reverb, Delay, Echo
Supports Audio Unit (AU)
Rating total: 4.82609 (23), current: 4.82609 (23)
Released 06/21/2019
Updated 12/20/2023

FabFilter Pro-Q 3 is an EQ plug-in with up to 24 bands, analog modeling, dynamic EQ, linear phase processing.

Price $29.99
Author FabFilter
Type Effect
Effect type Equalizer, Filter
Supports Audio Unit (AU)
Rating total: 4.74468 (47), current: 4.74468 (47)
Released 06/21/2019
Updated 03/23/2026

BLEASS filter is an essential tool for musicians: inspired by classic analog filters, it features an envelope follower as well as a LFO and a warm sound which create mind boggling filter sweep effects on any sound source: guitars, vocals, keyboards, drums ...

Price $3.99
Author BLEASS
Type Effect
Effect type Equalizer, Filter, Modulation effects
Supports Audiobus, Audio Unit (AU)
Rating total: 5 (21), current: 5 (21)
Released 06/20/2019
Updated 09/12/2025

Modley is a modulation delay with effect insert capabilities, which lets you design the whole delay signal with several carefully selected effect modules, to create customized signal flows and unique sounds.

Price $16.99
Author Klevgränd produkter AB
Type Effect
Effect type Reverb, Delay, Echo, Modulation effects
Supports Audio Unit (AU)
Rating total: 4.90909 (22), current: 4.90909 (22)
Released 06/18/2019
Updated 02/25/2021