iOS Musician Apps (567) Supported Technologies is Audio Unit (AU)

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Mozaic runs inside your favorite AU MIDI host, and gives you practical building blocks such as LFOs, pre-fab GUI layouts, musical scales, AUv3 support (with AU Parameters, transport events, tempo syncing, etc.), random generators and a super-simple yet powerful script language.

Price $1.99
Author Bram Bos
Type Tool
Supports Audiobus, Audio Unit (AU)
Rating total: 5 (80), current: 5 (80)
Released 05/17/2019
Updated 07/10/2025

This is a natural sounding reverb audio effect.

Price $1.99
Author Aleksandar Mlazev
Type Effect
Effect type Reverb, Delay, Echo
Supports Audio Unit (AU)
Rating total: 2.33333 (3), current: 2.33333 (3)
Released 01/16/2019
Updated 06/02/2023

So what is a midi echo? It is similar to the audio echo effect where copies of the original audio are repeated at regular time intervals but with some form of change (e.g. quieter). But unlike audio, midi is digital in nature (low resolution 8 bit mostly) and focused around the midi note on & off message used to control synths etc.

Price $1.99
Author anthony saunders
Type Tool
Supports Audiobus, Audio Unit (AU)
Rating total: 3.5 (8), current: 3.5 (8)
Released 10/25/2018
Updated 05/08/2019

RX950 Classic AD/DA Converter is a Classic AD/DA Converter emulator.

Price $1.99
Author Inphonik
Type Effect
Effect type Other
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 4.63999 (50), current: 4.63999 (50)
Released 07/28/2018
Updated 04/02/2019

Remake is a multi-band effect, includes gain, reverb.

Price $1.99
Author Aleksandar Mlazev
Type Effect
Effect type Equalizer, Filter, Reverb, Delay, Echo
Supports Audio Unit (AU)
Released 12/07/2017
Updated 05/24/2024

This synthesizer offers a brand new way of finding the optimal sound.

Price $1.99
Author Klevgränd produkter AB
Type Instrument
Instrument type Synth
Instrument sounds Keyboards
Supports Audio Unit (AU)
Rating total: 3.72222 (18), current: 3.72222 (18)
Released 08/31/2017
Updated 02/06/2025

Remake is a multi-band effect. The input signal is split into 3 parts. Then resonances are added to the lows (under 100Hz) and at the same time two harmonic voices are added to the mid frequencies only.

Price $1.99
Author Aleksandar Mlazev
Type Effect
Instrument sounds Other
Supports Audio Unit (AU)
Rating total: 5 (1), current: 5 (1)
Released 10/18/2017
Updated 03/06/2023

Stereo Phaser is a phaser effect that can run in stereo mode.

Price $1.99
Author Aleksandar Mlazev
Type Effect
Effect type Chorus, Flanger, Phaser etc., Stereo, Pan effects
Supports Audio Unit (AU)
Rating total: 1 (1), current: 1 (1)
Released 06/17/2017
Updated 01/10/2025

Classic vibrato and chorus effect.

Price $1.99
Author Aleksandar Mlazev
Type Effect
Effect type Chorus, Flanger, Phaser etc., Modulation effects, Pitch effects
Supports Audio Unit (AU)
Rating total: 3.5 (6), current: 3.5 (6)
Released 06/29/2017
Updated 09/18/2020

Warm Distortion is real time distortion audio effect.

Price $1.99
Author Aleksandar Mlazev
Type Effect
Effect type Distortion, Drive etc.
Supports Audio Unit (AU)
Rating total: 1 (1), current: 1 (1)
Released 04/03/2017
Updated 01/08/2025

PlaySections is an audio/video player that allows you to freely set marks and play back specific sections of your audio/video files.

Price $1.99
Author Hiroshi Kajihata
Type Instrument
Instrument type Sampler
Instrument sounds Other
Supports Audio Unit (AU)
Rating total: 5 (14), current: 5 (14)
Released 10/30/2015
Updated 09/09/2023

Harmonizer is real time audio pitch shifter effect that can mix harmonies into the original signal or run as realtime pitch shifter.

Price $1.99
Author Aleksandar Mlazev
Type Effect
Effect type Pitch effects
Supports Audio Unit (AU)
Rating total: 3 (9), current: 3 (9)
Released 03/02/2017
Updated 09/26/2020

Warm Distortion is Audio Unit effect app that creates nice distortion sound.

Price $1.99
Author Aleksandar Mlazev
Type Effect
Effect type Distortion, Drive etc.
Supports Audio Unit (AU)
Released 05/04/2017
Updated 06/14/2022

Musk MIDI Keyboard is an expandable MIDI keyboard.

Price $1.99
Author Dr. Garbers Softwareentwicklung
Type Controller
Supports Inter-App Audio (IAA), Audiobus, Audio Unit (AU)
Rating total: 3 (2), current: 3 (2)
Released 12/23/2013
Updated 12/22/2025

Studio quality reverb for AUv3 / Audiobus / Inter-app audio and songs from your iTunes music library.

Price $1.99
Author Harry Gohs
Type Effect
Effect type Reverb, Delay, Echo
Supports Inter-App Audio (IAA), Audiobus, Audio Unit (AU)
Rating total: 3.86364 (22), current: 3.86364 (22)
Released 08/05/2013
Updated 06/19/2025

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

This app is a music player that can process the following effects in real time: Time stretch (0.5-2.0 double speed), Pitch shift (-1 ~ +1 octave), 10 band equalizer.

Price $0.99
Author Loop-Sessions.LLC.
Type Effect
Effect type Equalizer, Filter, Pitch effects
Supports Audio Unit (AU)
Rating total: 3.75 (24), current: 3.75 (24)
Released 11/15/2013
Updated 03/22/2026

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

This app is realtime voice changer that can work without headphones. When you speak, it will speak together with you making your voice to sound like alien robot.

Price $0.99
Author Aleksandar Mlazev
Type Effect
Effect type Vocal effects, Other
Supports Audio Unit (AU)
Rating total: 2 (4), current: 2 (4)
Released 10/30/2018
Updated 03/05/2023