iOS Musician Apps (578) Supported Technologies is Audio Unit (AU)

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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 $7.99
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: 4.85714 (28), current: 4.85714 (28)
Released 05/23/2019
Updated 09/09/2022

The WoodStepper is a sequencer having both audio and midi out.

Price $10.99
Author Woodman's Immaculate Maple Syrup Studio
Type Tool
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 4.33333 (12), current: 4.33333 (12)
Released 06/01/2019
Updated 07/01/2024

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 08/05/2022

Virtual ANS is a software simulator of the unique Russian synthesizer ANS - photoelectronic musical instrument created by Evgeny Murzin from 1938 to 1958.

Price $5.99
Author Alexander Zolotov
Type Instrument
Instrument type Synth
Instrument sounds Keyboards
Supports Audiobus, Audio Unit (AU)
Rating total: 4.71429 (56), current: 4.71429 (56)
Released 06/03/2019
Updated 10/23/2023

Pure Synth® Platinum is a full-blown rompler/synthesizer for your iOS device. Neither the synth engine or the sample engine is an afterthought: Both engines are fully capable and feature-rich. The romper section contains a well rounded assortment of analog, synth, string, digital, and acoustic instruments.

Price Free
Author MIDIculous LLC
Type Instrument
Instrument type Sampler, Synth
Instrument sounds Keyboards, All-in-one
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 3.56098 (41), current: 3.56098 (41)
Released 06/11/2019
Updated 07/22/2025

The music theory reference tool for musicians of all skill levels. Tonality allows you to view and listen to a large database of piano chords and scales and features a chord-recognition tool that can identify chords you play on your instrument.

Price $7.99
Author Bryce Hostetler
Type Tool
Supports Audio Unit (AU)
Rating total: 4.80488 (123), current: 4.80488 (123)
Released 06/13/2019
Updated 11/20/2023

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: 3.02703 (37), current: 3.02703 (37)
Released 06/14/2019
Updated 02/08/2023

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

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 $15.99
Author Klevgränd produkter AB
Type Effect
Effect type Reverb, Delay, Echo, Modulation effects
Supports Audio Unit (AU)
Rating total: 4.90475 (21), current: 4.90475 (21)
Released 06/18/2019
Updated 02/25/2021

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 (20), current: 5 (20)
Released 06/20/2019
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 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-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: 4.75 (20), current: 4.75 (20)
Released 06/21/2019
Updated 12/20/2023

FabFilter Pro-C 2 is a compressor plug-in with a side chain options and a program-dependent compression styles.

Price $29.99
Author FabFilter
Supports Audio Unit (AU)
Rating total: 4.81818 (22), current: 4.81818 (22)
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-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: 4.92856 (14), current: 4.92856 (14)
Released 06/21/2019
Updated 12/20/2023

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

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

Spectrum is a collection of Audio Unit ports of popular eurorack synthesizer modules.

Price Free
Author Thomas Burns
Type Instrument
Instrument type Synth
Instrument sounds Keyboards
Supports Audiobus, Audio Unit (AU)
Rating total: 4.80469 (128), current: 4.80469 (128)
Released 07/06/2019
Updated 08/02/2021

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