iOS Musician Apps (288) Supported Technologies is Audio Unit (AU), Type is Effect

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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 09/30/2025

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

Price $19.99
Author Eventide
Type Effect
Effect type Reverb, Delay, Echo
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 4.63157 (57), current: 4.63157 (57)
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

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: 4.63077 (65), current: 4.63077 (65)
Released 07/30/2019
Updated 10/28/2025

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

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

Binaural Location goes beyond the simple pan control; it allows you to place your audio at a specific location anywhere in a virtual space around the listener. The location of the L and R control points on the screen controls the location of two virtual speakers. Based on the angle and distance from the speakers to the listener's ears, the app creates a realistic impression that the sound is actually coming from the specific location of the L and R points.

Price $4.99
Author Blue Mangoo Consulting Company Limited
Type Effect, Tool
Effect type Stereo, Pan effects
Supports Audio Unit (AU)
Rating total: 3.71429 (14), current: 3.71429 (14)
Released 06/15/2019
Updated 06/25/2021

The Vocal Harmonizer plugin was specifically designed for adding harmonies and basic auto tuning frunctionality to recorded vocal lines. It is specifically tuned to the frequency range of the human voice and tracks the incoming vocal frequency attempting to tune to the desired musical key and mode of your song.

Price $9.99
Author 4Pockets.com
Type Effect
Effect type Vocal effects
Supports Audio Unit (AU)
Rating total: 3 (38), current: 3 (38)
Released 06/14/2019
Updated 02/08/2023

MagicDeathEye is an emulation of a high-end tube compressor, available in AUv3 and interapp audio format.

Price $24.99
Author Christian Siedschlag
Type Effect
Effect type Compressor, Limiter, Gate
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 4.8 (20), current: 4.8 (20)
Released 06/02/2019
Updated 12/17/2025

The BLEASS sidekick AUv3 is the world's first iOS AUv3 effect plugin that offers a kick drum synth and sequencer coupled with a sidechain compressor in order to bring unique and creative dynamics to your music!

Price $6.99
Author BLEASS
Type Instrument, Effect
Instrument type Synth
Instrument sounds Drums, Percussion
Effect type Compressor, Limiter, Gate, Other
Supports Audiobus, Audio Unit (AU)
Rating total: 4.86207 (29), current: 4.86207 (29)
Released 05/23/2019
Updated 09/09/2022