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

AudioKit Synth One is a completely free & open-source professional iOS Synthesizer. 

Express yourself. Create your signature retro piano sound. Simple controls allow you to easily create an emotional vibe for your next hit record.

Epic 64-voice Virtual Analog / PCM iPad Synth. Inspired by the Digital Synths of the 80s and 90s.

Multieffect Audioprocessor. Seven studio quality effect modules for live usage and to enrich your iTunes music library.

This audio shredder does just what is says, it shreds incoming audio (usually strings or lengthy sustained chords) into bite size pieces, adds an envelope and passes through a filter of choice.

This app is a portable multitrack audio and MIDI recording studio featuring virtual instruments, editing with unlimited undo/redo, mixing, real-time effects, automation and much more!

High quality real time reverb AudioUnit effect, for everything between small rooms, resonators, and infinitely large spaces.

A highly tweakable stereo delay AudioUnit effect, suitable for everything from clean digital delays to filthy dub echoes, flangers and broken cassette tapes.

ArpBud 2 is a MIDI Arpeggiator app where you can create unique arp patterns and be able to arpeggiate your favorite software or hardware synthesizers.

apeMatrix is a unique AU/IAA routing tool that gives you total control over what you want to do and how you want to do it.

apeFilter is a sophisticated Equaliser, the DSP is based on the Biquad/Cascade filters, very fast!

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

Aparillo is an advanced 16 voice FM synth tailored for complex sound structures , majestic motions, moving and evolving soundscapes and atmospheres that are perfect for film, TV or games.

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

Combine 3 oscillators and a noise envelope to produce bright 80s-style synths, deep rich bass, punchy kicks and snares, a variety of screaming leads, and even breathy percussion.

This is a AUv3 compatible analyser / tuner which can be used as plugin with your favourite DAW such as Cubasis, Meteor, Auria or GarageBand.

Analog Rack Tremolo pretty simple and effective tremolo Fx plugin.

Analog Rack Screamer a very special overdrive pedal emulation inspired by the famous green stomp box.

Analog Rack Reverb two plugins in one, Stereo Hall and Stereo Room reverb algorithms ideal for every source!