iOS Musician Apps (569) Supported Technologies is Audio Unit (AU)

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If you play a musical instrument, this app should be supported by you lower the speed and play when you copy of a musical piece.

Price Free
Author Loop-Sessions.LLC.
Type Effect
Effect type Pitch effects
Supports Audio Unit (AU)
Rating total: 3.33333 (18), current: 3.33333 (18)
Released 04/26/2013
Updated 01/05/2026

Poison-202 is a professional Vintage Midi Synthesizer.

Price $9.99
Author Dmitrij Pavlov
Type Instrument
Instrument type Synth
Instrument sounds Keyboards
Supports Inter-App Audio (IAA), Audiobus, Audio Unit (AU)
Rating total: 4.72085 (283), current: 4.72085 (283)
Released 09/09/2016
Updated 01/05/2026

Chameleon is an AUv3 compatible sampler instrument plugin for your favourite DAW.

Price $12.99
Author 4Pockets.com
Type Instrument
Instrument type Sampler
Instrument sounds Other
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 4.37209 (43), current: 4.37209 (43)
Released 03/23/2019
Updated 12/11/2025

ToneBoosters ReelBus is a magnetic tape simulation plug-in for iOS or iPadOS device.

Price $8.99
Author ToneBoosters
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 4.90909 (44), current: 4.90909 (44)
Released 10/06/2019
Updated 01/03/2026

Dagger is an analog modeling paraphonic synth with a big, raw analog sound.

Price $9.99
Author BeepStreet
Type Instrument
Instrument type Synth
Instrument sounds Keyboards
Supports Audio Unit (AU)
Rating total: 4.95 (40), current: 4.95 (40)
Released 08/04/2023
Updated 08/04/2023

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

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

Based on Classic American EQ from the late '60s, the EQ550b is a continuation of the EQ that played a major role in the history of music recording, but with an additional filter band and several new frequencies.

Price Free
Author RRS, OOO
Type Effect
Effect type Equalizer, Filter
Supports Audio Unit (AU)
Rating total: 4.76923 (13), current: 4.76923 (13)
Released 04/10/2020
Updated 01/02/2026

The EQ550 faithfully captures the punch, low-frequency transparency, and ultra-tight imaging of iconic American EQs of the late 1960’s.

Price Free
Author RRS, OOO
Type Effect
Effect type Equalizer, Filter
Supports Audio Unit (AU)
Rating total: 4.45455 (11), current: 4.45455 (11)
Released 04/10/2020
Updated 01/02/2026

PolyIvoks Filter developed on the basis of the filter of the legendary Soviet synthesizer from 1980s, and only now the legendary Soviet analog sound became available in stereo mode.

Price Free
Author RRS, OOO
Type Effect
Effect type Equalizer, Filter
Supports Audio Unit (AU)
Rating total: 4.66667 (21), current: 4.66667 (21)
Released 04/13/2020
Updated 12/29/2025

Comp 609 is a compressor AUv3 plug-in.

Price Free
Author RRS, OOO
Type Effect
Effect type Compressor, Limiter, Gate
Supports Audio Unit (AU)
Rating total: 4.84 (25), current: 4.84 (25)
Released 08/15/2020
Updated 12/28/2025

ToneBoosters Spectrogram shows a real-time spectrogram of the incoming audio signal. The ToneBoosters Spectrogram app captures the microphone input and processes the signals in real time.

Price Free
Author ToneBoosters
Type Tool
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 4.41859 (43), current: 4.41859 (43)
Released 09/08/2020
Updated 12/28/2025

The Red Rock Sound Exciter will allow you to improve and enhance sonic quality of signal more naturally than with equalization. Unlike traditional EQ that just turns up the existing harmonics, Exciter generates additional harmonics, therefore there is no boost in the output signal level, this maintains a clear and balanced sound.

Price Free
Author RRS, OOO
Type Effect
Effect type Equalizer, Filter, Other
Supports Audio Unit (AU)
Rating total: 4.85714 (21), current: 4.85714 (21)
Released 04/30/2020
Updated 12/29/2025

The EQP-1A based on Classic Program Equalizer from the '60s, original EQ is renowned for its unique ability to boost and cut the same frequencies simultaneously, thereby creating a resonant shelf, the EQP-1A faithfully models the overbuilt transformers and complex tube amplifiers of the original hardware.

Price Free
Author RRS, OOO
Type Effect
Effect type Equalizer, Filter
Supports Audio Unit (AU)
Rating total: 5 (15), current: 5 (15)
Released 09/08/2021
Updated 12/29/2025

The MEQ-5 based on Classic Mid-Range Equalizer from the '70s, with two bands of midrange boost and one band of midrange dip, the MEQ-5 gets the very best out of the «power region» where guitars and vocals can make or break a mix.

Price Free
Author RRS, OOO
Type Effect
Effect type Equalizer, Filter
Supports Audio Unit (AU)
Rating total: 5 (6), current: 5 (6)
Released 09/08/2021
Updated 12/29/2025

The EQP-1A based on Classic Program Equalizer from the '60s, original EQ is renowned for its unique ability to boost and cut the same frequencies simultaneously, thereby creating a resonant shelf, the EQP-1A faithfully models the overbuilt transformers and complex tube amplifiers of the original hardware.

Price Free
Author RRS, OOO
Type Effect
Effect type Equalizer, Filter
Supports Audio Unit (AU)
Rating total: 5 (5), current: 5 (5)
Released 09/08/2021
Updated 12/29/2025

Convolution is a highly complex signal processing approach, that needs some certain computation power. The recorded impulse response of a real world environment is used to render a reverberation effect onto any audio material, so that it sounds like the source was played in that original room or at that location.

Price $14.99
Author Jens Guell
Type Effect
Effect type Reverb, Delay, Echo
Supports Audio Unit (AU)
Rating total: 4.59999 (5), current: 4.59999 (5)
Released 01/10/2020
Updated 03/03/2024

The Red Rock Sound SA60 real time 1/3 octave Spectrum Analyser combines ease of use, accuracy and versatility in one economical, reliable unit. Interface is modelled on classic DN60 spectrum analyser, originally developed in 1980.

Price Free
Author RRS, OOO
Type Tool
Supports Audio Unit (AU)
Rating total: 5 (10), current: 5 (10)
Released 05/15/2020
Updated 12/29/2025

Does your bass sound dull and lifeless? Red Rock Sound Bass Enhancer will be your choice to correct this deficiency. Bass Enhancer designed for saturation harmonics of low-frequency, it creates the effect of lower, deeper frequencies. This effect can not be created with simple equalization.

Price Free
Author RRS, OOO
Type Effect
Effect type Bass effects
Supports Audio Unit (AU)
Rating total: 4.54054 (37), current: 4.54054 (37)
Released 04/18/2020
Updated 12/28/2025
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