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

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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

Analog Rack Reverb two plugins in one, Stereo Hall and Stereo Room reverb algorithms ideal for every source!

Price $3.99
Author Nembrini Audio
Type Effect
Effect type Reverb, Delay, Echo
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 4.66667 (9), current: 4.66667 (9)
Released 02/07/2020
Updated 09/27/2021

RE-1 is a full featured virtual Tape Machine capable of delivering authentic tape based echo and chorus effects but it doesn't stop there. With it's interactive tape player, sample, loop and overdub features it's possible to use it like a virtual tape recorder, sample player, looper or simply as a master effect.

Price $9.99
Author Kai Aras
Type Effect
Effect type Reverb, Delay, Echo, Other
Supports Inter-App Audio (IAA), Audiobus, Audio Unit (AU), Ableton Link
Rating total: 4.68939 (132), current: 4.68939 (132)
Released 08/23/2018
Updated 04/29/2024

Discord4 is the latest version of our most popular and long-lived product, our Discord stereo pitch shifter. Originally modeled from the H910, Discord has long since become its own effect and a studio standby, and this version includes major additions to further stretch its capabilities.

Price $8.99
Author Audio Damage, Inc.
Type Effect
Effect type Reverb, Delay, Echo, Pitch effects
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 4.68966 (29), current: 4.68966 (29)
Released 02/24/2018
Updated 10/09/2019

A true guitarist’s amp, 20th Anniversary excels at clean, blues and rock tones, with a full pedalboard of classic FX and an eye-catching intuitive interface.

Price $11.99
Author db audioware
Type Effect
Effect type Guitar effects
Supports Audio Unit (AU)
Rating total: 4.7 (20), current: 4.7 (20)
Released 04/04/2021
Updated 04/04/2021

BLEASS Compressor is a tool for iOS musicians offering external sidechain input, input filters and real-time visualization with very low CPU usage.

Price $4.99
Author BLEASS
Type Effect
Effect type Compressor, Limiter, Gate
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 4.7037 (27), current: 4.7037 (27)
Released 11/10/2020
Updated 06/17/2022

Koshiba is a 16-step gate sequencer plug-in effect that can transform a sustained sound into a rhythmic phrase.

Price $5.00
Author iceWorks, Inc.
Type Effect
Effect type Other
Supports Inter-App Audio (IAA), Audiobus, Audio Unit (AU), Ableton Link
Rating total: 4.70587 (17), current: 4.70587 (17)
Released 10/26/2020
Updated 09/07/2025

NuRack is an AUv3 based multi-channel audio effects processor with a difference, it actually allows you to design your own custom effects using the building blocks provided.

Price $12.99
Author 4Pockets.com
Type Effect
Effect type All-in-one
Supports Audio Unit (AU)
Rating total: 4.71429 (42), current: 4.71429 (42)
Released 06/26/2020
Updated 08/30/2025

Tape Cassette 2 is an audio plugin that emulates the warmth, noise and character of old tape cassettes. Following up from our well received Tape Cassette 1, we’ve updated the plugin with a sleek interface and more changes under the hood too.

Price Free
Author Caelum Audio
Type Effect
Effect type Equalizer, Filter, Other
Supports Audio Unit (AU)
Rating total: 4.71429 (42), current: 4.71429 (42)
Released 06/05/2020
Updated 09/13/2022

The Cali Reverb Modern High Gain Amplifier is the best emulation of another rock icon guitar amplifier that has defined the tone of heavy music for the last 25 years!

Price $19.99
Author Nembrini Audio
Type Effect
Effect type Reverb, Delay, Echo
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 4.71429 (14), current: 4.71429 (14)
Released 04/30/2020
Updated 09/27/2021

Play or save the files with added reverb. Use play through mode or Audiobus for realtime reverberation.

Price Free
Author Markus Sigg
Type Effect
Effect type Reverb, Delay, Echo
Supports Audiobus, Audio Unit (AU)
Rating total: 4.71875 (32), current: 4.71875 (32)
Released 04/26/2013
Updated 03/24/2026

During a routine mining expedition in the outer regions of the galaxy five mysterious boxes of unknown origin were found. Rumours among the workers spread quickly that there was a strange feeling being around these boxes, as if time flows in a different way, not just forward but sometimes also folding back on itself. The miners nicknamed them, the five boxes of reverberation. After the excavation process, to study them more closely, it was decided to transport them back to earth.

Price $4.99
Author Erik Sigth
Type Effect
Effect type Reverb, Delay, Echo
Supports Inter-App Audio (IAA), Audiobus, Audio Unit (AU)
Rating total: 4.71929 (57), current: 4.71929 (57)
Released 10/02/2021
Updated 06/17/2024

Scatterbrain is a plugin audio effect (AUv3, Audio Unit), which chops up incoming audio into rhythmical steps and sends these slices out to multiple outputs in your plugin host.

Price $3.99
Author Bram Bos
Type Effect
Effect type Other
Supports Audio Unit (AU)
Rating total: 4.72 (50), current: 4.72 (50)
Released 02/13/2020
Updated 11/30/2021

Flux Mini is an AUv3 audio effect that adds life, character and dynamism to your tracks. The customisable graph creates a shape which affects either the amplitude, low-pass filter or high-pass filter. You can emphasize the frequency modulation with the resonance knob too!

Price Free
Author Caelum Audio
Type Effect
Effect type Equalizer, Filter
Supports Audio Unit (AU)
Rating total: 4.72499 (40), current: 4.72499 (40)
Released 02/05/2021
Updated 02/19/2021

Tape Pro is a multi-fx tape emulation AUv3 plugin and app that introduces warmth, frequency shaping, modulation, noise and delay.

Price $7.99
Author Caelum Audio
Type Effect
Effect type Equalizer, Filter, Other
Supports Audio Unit (AU)
Rating total: 4.73332 (15), current: 4.73332 (15)
Released 10/30/2020
Updated 12/17/2022

BLEASS delay transforms your sounds into cinematic and experimental sonic experiences! It is constantly creating flux in the audio signal making your music even more lively.
BLEASS delay is also ideal for making track build-ups and transitions.

Price $6.99
Author BLEASS
Type Effect
Effect type Reverb, Delay, Echo
Supports Audiobus, Audio Unit (AU)
Rating total: 4.73468 (49), current: 4.73468 (49)
Released 02/21/2019
Updated 09/12/2025

BLEASS Slow Machine can deepen any beat by completely or partially slowing down the audio signal, transform epic leads into heavy basses, and add some “tape stop” effect with precision either by touching the X/Y Stop trigger, or by dialing in precise sequence automations

Price $6.99 $4.99
Author BLEASS
Type Effect
Effect type Pitch effects, Other
Supports Audio Unit (AU)
Rating total: 4.73684 (38), current: 4.73684 (38)
Released 02/01/2021
Updated 09/26/2025

Ratshack Reverb is a detailed model of that classic of classics, the Realistic Electronic Reverb. Now, you can have the sound of everyone's first analog delay unit, without ever having to change batteries!

Price $0.99
Author Audio Damage, Inc.
Type Effect
Effect type Reverb, Delay, Echo
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 4.73913 (23), current: 4.73913 (23)
Released 10/20/2018

The BLEASS reverb is a reverb plugin.

Price $6.99
Author BLEASS
Type Effect
Effect type Reverb, Delay, Echo
Supports Audiobus, Audio Unit (AU)
Rating total: 4.74193 (31), current: 4.74193 (31)
Released 04/10/2019
Updated 09/12/2025

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