iOS Musician Apps (625) Supported Technologies is Audio Unit (AU)

Visual Reverb is a plate reverb with multi-band EQ and the ability to analyse audio in real time giving a spectrum representation of your signal flow.

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. 

DerVoco is a vintage vocoder emulation. DerVoco uses analog modelled components including filters, envelope followers and companders to create a warm vintage sound instead of digital techniques like FFT.

This one is quite experimental and CPU heavy app!

From subtle tube-style saturation to full-on mangled wavetable distortion, Grind is a Swiss Army Knife of sound design.

KeyStage is a master controller, AUv3 host, and audio mixer app designed mainly for keyboard players.

KeyStage is a master controller, AUv3 host, and audio mixer app designed mainly for keyboard players.

With AnyAmpIR, I don't give you any amp, I give you the ability to play any amp immediately.

DigiKeys is an AUv3 compatible MIDI sequencer plugin for AUM or other AUv3 compatible host applications.

FilterMorph plugin takes the concept of a traditional audio filter and pairs it with overdrive, bit crunching and tape delay to perform some incredibly neat real-time or beat synced automation effects.

Built for Live performance and hands free use, Quantiloop recreates the simplicity of a hardware loop pedal in an iOS app.

AUSH is a music sequencer with support for AUv3 Audio Unit Plugins available for iPhone, iPad and iPod Touch.

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.

Play your favorite songs in their original sound using your iPhone or iPad. It's a whole new experience in learning songs.

rambo is an innovative modular groovebox and audio processing environment.

ChowKick is a kick drum synthesizer based on creative physical modelling of old drum machine circuits. The synth contains
useful parameters for adjusting the tone and fundamental frequency of the synthesized kick drum.

A simple but straightforward flange audio effect to give you that nice retro feel.

A simple but straightforward phaser audio effect to give you that nice retro feel.

A simple but fast low-pass filter with control over cutoff frequency and resonance factor.

Spatializer is a great choice if you want to widen your sounds.