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

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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

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

Harmonic Exciter is an AUv3 Compatible plugin for your favourite DAW such as Cubasis, Auria, AUM, Meteor, BM3 or GarageBand etc.

Price $8.99
Author 4Pockets.com
Type Effect
Effect type Other
Supports Audio Unit (AU)
Rating total: 2.83333 (6), current: 2.83333 (6)
Released 04/09/2019
Updated 09/04/2025

This is an AUv3 compatible processor friendly stereo pitch shifter plugin which can be used as a plugin with your favourite DAW such as Cubasis, Auria, Meteor or GarageBand.

Price $5.99
Author 4Pockets.com
Type Effect
Effect type Pitch effects
Supports Audio Unit (AU)
Rating total: 3 (8), current: 3 (8)
Released 11/05/2018
Updated 01/28/2019

A brickwall peak limiting app, for the complete control of your audio volume.

Price $2.99
Author Amazing Noises
Type Effect
Effect type Compressor, Limiter, Gate
Supports Inter-App Audio (IAA), Audiobus, Audio Unit (AU)
Rating total: 4.3871 (31), current: 4.3871 (31)
Released 12/17/2014
Updated 01/28/2026

AudioTune is a new real-time pitch correction AUv3 plugin from Coda Labs and AudioKit. Make vocals and instruments sound more in tune, or add creative robotic tuning effects in real-time with nearly zero latency.

Price $2.99
Author Coda Labs Incorporated
Type Effect
Effect type Pitch effects, Vocal effects
Supports Audio Unit (AU)
Rating total: 3.62245 (98), current: 3.62245 (98)
Released 06/04/2020
Updated 03/10/2021

BitJuggler is an audio plugin to simulate vintage digital processing and to recreate digital imperfections.

Price $6.99
Author ToneBoosters
Type Effect
Effect type Other
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 4.35714 (14), current: 4.35714 (14)
Released 11/07/2020
Updated 10/05/2025

ToneBoosters Barricade is a peak limiter and compressor.

Price $8.99
Author ToneBoosters
Type Effect
Effect type Compressor, Limiter, Gate
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 4.7931 (29), current: 4.7931 (29)
Released 09/17/2019
Updated 09/28/2025

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

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

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

DerVoco is a vintage vocoder emulation. DerVoco uses analog modelled components including filters, envelope followers and companders to create a warm vintage sound instead of digital techniques like FFT.

Price $2.99
Author BeepStreet
Type Effect
Effect type Vocoder
Supports Audio Unit (AU)
Rating total: 3.63636 (22), current: 3.63636 (22)
Released 07/02/2018

A simple but straightforward phaser audio effect to give you that nice retro feel.

Price $0.99
Author Brad Howes
Type Effect
Effect type Chorus, Flanger, Phaser etc.
Supports Audio Unit (AU)
Rating total: 3 (1), current: 3 (1)
Released 03/11/2021
Updated 02/27/2026

A simple but straightforward flange audio effect to give you that nice retro feel.

Price $0.99
Author Brad Howes
Type Effect
Effect type Chorus, Flanger, Phaser etc.
Supports Audio Unit (AU)
Rating total: 5 (1), current: 5 (1)
Released 02/24/2021
Updated 02/27/2026

A simple but fast low-pass filter with control over cutoff frequency and resonance factor.

Price $0.99
Author Brad Howes
Type Effect
Effect type Equalizer, Filter
Supports Audio Unit (AU)
Released 02/15/2021
Updated 02/27/2026

A highly tweakable stereo delay AudioUnit effect, suitable for everything from clean digital delays to filthy dub echoes, flangers and broken cassette tapes.

Price $5.99
Author Kymatica AB
Type Effect
Instrument sounds All-in-one
Supports Audio Unit (AU)
Rating total: 5 (20), current: 5 (20)
Released 12/10/2020
Updated 11/12/2021

High quality real time reverb AudioUnit effect, for everything between small rooms, resonators, and infinitely large spaces.

Price $4.99
Author Kymatica AB
Type Effect
Effect type Reverb, Delay, Echo
Supports Audio Unit (AU)
Rating total: 5 (14), current: 5 (14)
Released 12/08/2020
Updated 11/12/2021

WOOTT uses a triple band dynamics algorithm with simultaneous downwards AND upwards compression, and adds a dedicated limiter to each band.

Price $4.99
Author Bram Bos
Type Effect
Effect type Compressor, Limiter, Gate
Supports Audio Unit (AU)
Rating total: 4.87037 (54), current: 4.87037 (54)
Released 06/02/2020
Updated 03/03/2024

ToneBoosters Morphit is an AUv3 plugin for headphones correction and simulation and removes any unwanted coloration from your headphones!

Price $8.99
Author ToneBoosters
Type Effect
Effect type Equalizer, Filter, Other
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 4.64516 (31), current: 4.64516 (31)
Released 11/16/2019
Updated 10/28/2025