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

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Eventide Crystals Harmonizer® combines twin reverse pitch shifters with reverse delays and reverb. This iconic H3000 effect can be used to create out-of-this-world climbing and cascading pitched delays or to create unique sounding reverbs. It features two reverse granular delays that can be manipulated by length and pitch.

Price $14.99
Author Eventide
Type Effect
Effect type Equalizer, Filter, Reverb, Delay, Echo, Pitch effects
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 4.59999 (20), current: 4.59999 (20)
Released 06/08/2020
Updated 03/06/2024

Rotary is a rotating cabinet effect that simulates a Leslie speaker. It produces a pulse-like vibrato effect depending on the speed of rotation.

Price $7.99
Author Eventide
Type Effect
Effect type Modulation effects
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 4.30435 (23), current: 4.30435 (23)
Released 10/09/2019
Updated 03/06/2024

Undulator is Eventide’s classic modulated tremolo effect from the iconic H3000 effects processor.

Price $7.99
Author Eventide
Type Effect
Effect type Modulation effects, Pitch effects
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 4.27273 (11), current: 4.27273 (11)
Released 07/13/2020
Updated 03/06/2024

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

CrushStation is an overdrive/distortion effects plug-in with controls that drive your tone anywhere from a creamy saturation to a brutal sonic assault, with everything in between.

Price $14.99
Author Eventide
Type Effect
Effect type Distortion, Drive etc.
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 4.66667 (12), current: 4.66667 (12)
Released 04/20/2020
Updated 03/06/2024

The ERS 250 reverb audio plugin was originally designed and sold by Harrie Munnik and his Dutch company EmptyRoomSystems.

Price $13.99
Author Christian Siedschlag
Type Effect
Effect type Reverb, Delay, Echo
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 4.33333 (6), current: 4.33333 (6)
Released 09/03/2021
Updated 01/03/2026

Traditional EQs influence the spectrum of the whole stereo field simultaneously. DirectionalEQ takes this concept one big step further: now you can equalize all directions in the stereo field independently.

Price $9.99
Author Christian Siedschlag
Type Effect
Effect type Equalizer, Filter
Supports Audio Unit (AU)
Rating total: 3.64286 (14), current: 3.64286 (14)
Released 10/27/2017
Updated 01/02/2026

The 6144 is an Audio Unit equalizer which aims to recreate the legendary sound of the Neve hardware EQs.

Price $9.99
Author Christian Siedschlag
Type Effect
Effect type Equalizer, Filter
Supports Audio Unit (AU)
Rating total: 4.27273 (33), current: 4.27273 (33)
Released 07/18/2016
Updated 12/15/2025

Envelope is a high class reverb audio unit for use as a standalone app or (preferably) in AUv3 hosts.

Price $9.99
Author Christian Siedschlag
Type Effect
Effect type Reverb, Delay, Echo
Supports Audio Unit (AU)
Rating total: 3.94737 (19), current: 3.94737 (19)
Released 06/15/2016
Updated 01/02/2026

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

A professional compressor plugin in the audio unit format.

Price $9.99
Author Christian Siedschlag
Type Effect
Effect type Compressor, Limiter, Gate
Supports Audio Unit (AU)
Rating total: 3.8 (15), current: 3.8 (15)
Released 05/28/2017
Updated 12/15/2025

The WoodLofier is both a standalone app and AUv3 plugin which combines 4 different sections to make your sound more lofi or to add some creative twist  : filtering (and Sample Rate reduction), a Tape wobble unit, Noise addition and Crushing (clipping, bit reduction and saturation).

Price $8.99
Author Woodman's Immaculate Maple Syrup Studio
Type Effect
Effect type Distortion, Drive etc., Other
Supports Audio Unit (AU)
Rating total: 5 (6), current: 5 (6)
Released 02/14/2019
Updated 10/12/2024

The Wood'nGate is an audio gate which is both a standalone app supporting IAA (Inter-App Audio) and an AUv3 audio unit plugin.

Price $7.99
Author Woodman's Immaculate Maple Syrup Studio
Type Effect
Effect type Compressor, Limiter, Gate
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 5 (6), current: 5 (6)
Released 09/17/2018
Updated 12/18/2024

Woodpressor is a high-end audio compressor. It is both a standalone app supporting IAA (Inter-App Audio) and an AUv3 audio unit plugin.

Price $9.99
Author Woodman's Immaculate Maple Syrup Studio
Type Effect
Effect type Compressor, Limiter, Gate
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 5 (3), current: 5 (3)
Released 08/02/2018
Updated 04/18/2023

WoodScaper combines into one unit the 4 classic guitar effects : phaser, chorus/flanger, wah-wah and tremelo.

Price $9.99
Author Woodman's Immaculate Maple Syrup Studio
Type Effect
Effect type Chorus, Flanger, Phaser etc., Modulation effects, Pitch effects, Guitar effects
Supports Audio Unit (AU)
Rating total: 4.85714 (7), current: 4.85714 (7)
Released 05/03/2020
Updated 06/20/2024

Kompresor is a versatile and powerful, yet easy to use, compressor.

Price $24.99
Author Shattered Glass Audio
Type Effect
Effect type Compressor, Limiter, Gate
Supports Audio Unit (AU)
Rating total: 5 (4), current: 5 (4)
Released 09/07/2021
Updated 11/18/2025

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 Saturn 2 is a high-quality distortion/saturation plug-in with a huge range of distortion models ranging from subtle to screaming vintage amp modelling, multiple frequency bands, hugely flexible modulation system, and a very modern, well-designed user interface.

Price $24.99
Author FabFilter
Type Effect
Effect type Equalizer, Filter, Distortion, Drive etc., Guitar effects
Supports Audio Unit (AU)
Rating total: 4.90909 (33), current: 4.90909 (33)
Released 06/25/2020
Updated 12/20/2023

apeFilter is a sophisticated Equaliser, the DSP is based on the Biquad/Cascade filters, very fast!

Price $7.99
Author apeSoft
Type Effect
Effect type Equalizer, Filter
Supports Inter-App Audio (IAA), Audiobus, Audio Unit (AU), Ableton Link
Rating total: 4.84848 (33), current: 4.84848 (33)
Released 09/30/2014
Updated 07/22/2025
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