iOS Musician Apps (188) Supported Technologies is Ableton Link

With Hey Metronome, you can put your earbuds on and control everything with your voice, from tempo and meter, to beat patterns, to even what song you are practicing. Just say, “Hey metronome set the tempo to 120,” “Hey metronome, shuffle,” or “Hey Metronome, next song,” and you’re off.

Shape is a polyphonic synthesiser allowing the user to draw the shape of the oscillator waveform.

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

Metronomics is not only a metronome, but a tool designed to help build a solid sense of time and rhythmic security.  It's a new kind of metronome -- use Metronomics to generate random patterns, sequenced grooves, or a combination of both to help you practice with more than just your typical click track.

VintageRack is a multi-effect application that contains modules modeling notable retro gear from the early digital era.

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

Dadachron is a standalone 12 track MIDI Step Sequencer to control all 12 outputs of your dada machines automat controller. Simply plug in your iPad to the automat via USB MIDI and start triggering notes, it works plug and play.

Laplace is a physical-modeling synthesizer based on resonator synthesis that makes it easy to create bowed string, plucked string, blown pipe and metallic sounds.