iOS Musician Apps (560) Supported Technologies is Inter-App Audio (IAA)

Music Studio offers a complete music production environment with features and a sound quality previously only known to desktop applications and expensive audio hardware.

Frekvens is a frequency shifter and delay effect.

MegaCurtisBig uses an unusual hybrid of wavetable and granular synthesis to create tones and timbres quite apart from the standard FM or subtractive synthesis fare.

With this instrument you can transform any sound into a playable musical instrument via a technique known as Granular Synthesis.

Navichord is a modern MIDI controller, working with software and hardware synths.

Annoydio has a grid of pads which you can assign, manipulate, and play sounds.

Annoydio jr has a grid of pads which you can assign, manipulate, and play sounds.

iSEM is a recreation of the classic 1974 Oberheim SEM (Synthesizer Expander Module), one of the world's first self-contained synthesizer modules and the first to bear the "Oberheim Electronics" name.

iSpark is an all-inclusive beat-making solution allowing to create rich tracks from A to Z while experiencing an unequaled workflow.

midiSTEPs is a powerful and fun MIDI step sequencer app that sends MIDI note and CC messages to other music apps and external synthesizers.

Explore unreal synthesis with the most unique performance control on iOS! TC-Performer presents a multi-touch performance environment unlike any other synthesizer.

Complete iOS Guitar Amps and Effects

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

Triqtraq LE is a free limited edition of the critically acclaimed music app Triqtraq - Jam Sequencer.

Reason Compact puts a powerful synthesizer right at your fingertips.

TouchOSC is a modular OSC and MIDI control surface for iPhone, iPod Touch and iPad by hexler.

S-Modular is a semi modular synthesizer for your iPad.

Samplist is a MIDI Sampler Instrument which allows you to easily chop a sample into different slices.

Designed by a musician for musicians Drums by Asrodot brings a novel twist to drumming on the iPad/iPhone.