Audio Unit (AU) Reverb, Delay, Echo Apps (67)

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Audio Unit (AU) technology enabled Reverb, Delay, Echo effect app list for iOS

RF-1 is an Algorithmic Reverb (AU, AB, IAA, Standalone).

Price $5.99 $2.99
Author Kai Aras
Type Effect
Effect type Reverb, Delay, Echo
Supports Inter-App Audio (IAA), Audiobus, Audio Unit (AU), Ableton Link
Rating total: 4.58333 (12), current: 4.58333 (12)
Released 10/13/2016
Updated 10/05/2020

FD-1 is a Semi-Modular Effect Plugin including dedicated Filter, Delay and Modulation sections.

Price $9.99 $4.99
Author Kai Aras
Type Effect
Effect type Equalizer, Filter, Reverb, Delay, Echo, Modulation effects
Supports Inter-App Audio (IAA), Audiobus, Audio Unit (AU)
Rating total: 4.625 (32), current: 4.625 (32)
Released 11/07/2019
Updated 09/24/2020

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 $4.99
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 06/28/2026

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 08/17/2026

BLEASS Motion FX contains 11 different effects which you can modulate precisely thanks to an intuitive and comprehensive sequencer.

Price $7.99 $4.99
Author BLEASS
Type Effect
Effect type Equalizer, Filter, Reverb, Delay, Echo, Modulation effects, Pitch effects, Other
Supports Audio Unit (AU)
Rating total: 4.83333 (12), current: 4.83333 (12)
Released 03/21/2021
Updated 08/15/2025

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)
Released 01/16/2019
Updated 08/09/2026

apeDelay - spectral Delay implements up to 2048 delay lines with feedback or up to 2048 Brick-wall filters.

Price $6.99 $3.99
Author apeSoft
Type Effect
Effect type Reverb, Delay, Echo
Supports Inter-App Audio (IAA), Audiobus, Audio Unit (AU), Ableton Link
Rating total: 4.58824 (17), current: 4.58824 (17)
Released 06/20/2015
Updated 07/22/2025

K7D is a vintage tape delay effect plugin for iOS.

Price $3.99
Author Imaginando Lda
Type Effect
Effect type Reverb, Delay, Echo
Supports Audiobus, Audio Unit (AU)
Rating total: 4.59494 (79), current: 4.59494 (79)
Released 05/06/2019
Updated 07/27/2026

DLYM is a ‘Delay Modulator’ plugin which produces flanger and chorus style effects using Imaginando’s powerful processing technology.

Price $3.99
Author Imaginando Lda
Type Effect
Effect type Reverb, Delay, Echo, Chorus, Flanger, Phaser etc.
Supports Inter-App Audio (IAA), Audiobus, Audio Unit (AU)
Rating total: 4.44954 (109), current: 4.44954 (109)
Released 06/20/2018
Updated 07/27/2026

ADverb2 is an accurate model of a vintage digital plate reverb rack unit from the 80s, with a few modern tricks up its sleeve.

Price $4.99
Author Audio Damage, Inc.
Type Effect
Effect type Reverb, Delay, Echo
Supports Inter-App Audio (IAA), Audio Unit (AU)
Rating total: 4.63157 (19), current: 4.63157 (19)
Released 04/30/2018
Updated 07/30/2026

TfxReverb is designed for simple and easy operation. When auto size mode is enabled, number of parameters can be controlled by a single dial to adjust size of the reverb sound, which can be synced to tempo.

Price $4.99
Author Ryo Togawa
Type Effect
Effect type Reverb, Delay, Echo
Supports Audio Unit (AU)
Rating total: 4.5 (8), current: 4.5 (8)
Released 08/31/2020
Updated 01/15/2026

TfxEcho is an echo effect AudioUnit Extension plugin. It uses delay lines which are inspired by BBD (bucket brigade device). BBD is used in various analog delay unit and is known for its warm and dark sound.

Price $4.99
Author Ryo Togawa
Type Effect
Effect type Reverb, Delay, Echo
Supports Audio Unit (AU)
Rating total: 4.66667 (12), current: 4.66667 (12)
Released 07/16/2020
Updated 01/15/2026

Yukawa is an AUv3 compatible multi-effects plug-in that combines a tempo-synchronized multi-tap sequence delay that produces rhythmic phrases, a modulatable stereo delay, and a DJ mixer-style filter.

Price $4.00
Author iceWorks, Inc.
Type Effect
Effect type Equalizer, Filter, Reverb, Delay, Echo
Supports Inter-App Audio (IAA), Audiobus, Audio Unit (AU), Ableton Link
Rating total: 4.78788 (33), current: 4.78788 (33)
Released 09/09/2020
Updated 09/07/2025

Kajita combines two-stage multi-tap stereo delay with reverb, allowing you to create complex spatial effects.

Price $4.00
Author iceWorks, Inc.
Type Effect
Effect type Reverb, Delay, Echo
Supports Inter-App Audio (IAA), Audiobus, Audio Unit (AU), Ableton Link
Rating total: 5 (20), current: 5 (20)
Released 08/29/2021
Updated 09/07/2025

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 06/23/2026

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

BLEASS Shimmer is an AUv3 compatible Shimmer Reverb Effect that brings harmonic tails to any sound or instrument with very low CPU usage.

Price $6.99
Author BLEASS
Type Effect
Effect type Reverb, Delay, Echo, Pitch effects
Supports Audiobus, Audio Unit (AU)
Rating total: 4.94285 (35), current: 4.94285 (35)
Released 06/17/2020
Updated 08/20/2025

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: 4.74 (50), current: 4.74 (50)
Released 02/21/2019
Updated 09/12/2025

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 $9.99
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

FabFilter Timeless 3 is a versatile, vintage-sounding tape delay, which will fully satisfy your everyday delay needs.

Price $24.99
Author FabFilter
Type Effect
Effect type Reverb, Delay, Echo
Supports Audio Unit (AU)
Rating total: 5 (27), current: 5 (27)
Released 05/27/2021
Updated 12/19/2023
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Did you know?

Audio Units (AU) is an audio plug-in technology built in Apple's macOS and iOS operating systems. Initially developed for desktop operating systems along with VST (Virtual Studio Technology by Steinberg GmbH), it available now for iOS too. AU apps (plug-ins) can modify sound pitch, sample rate and stream over network, produce signal.