iOS Musician Apps (118) Supported Technologies is Inter-App Audio (IAA), Instrument Sounds is Keyboards

Modulin is a customizable synthesizer. It allows for unique personal expression while providing a wide spectrum of visual feedback.

Portable Music Production Studio : create beats, compose whole tracks, sample, record, sequence, perform, mix and arrange your own music.

AutoArp turns your iPhone (or iPod Touch) into a musical instrument that is halfway between a traditional auto-harp zither and an arpeggiated analogue-style synth.

Fed up with standardized presets and instruments? Feel lost in overcomplex filters and effects? Don’t wanna sound like everyone else? BLEASS is just the right instrument for you: it unleashes your inner musical creativity by bringing music production and performance to its very core: play, perform, compose beats and melodies in a new yet intuitive way thanks to its multitrack sequencer, synthesizer and drum machine.

The second best sounding piano app in the App Store (after "Colossus Piano")!

SynthQ is a subtractive synthesizer with a customizable interface.

SpringSound is a physical-modeling audio synthesizer that produces sounds by simulating interactions and vibrations of a set of activators and masses connected to springs.

Musyc is a fun and innovative music application where touch turns into music.

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.

Synthesis without the spaghetti. From the creators of Grain Science and Sylo Synth (used by Gorillaz and The Flaming Lips).

Nanologue boasts a wide scope of inspiring sounds and professional sound effects, sporting a straightforward multi-touch interface and a great-sounding monophonic synthesizer.

Historic Harpsichords - Ruckers 1628 is a sampled recreation of one of the greatest and most valuable harpsichords of all time.

For all creatures in the ocean of sound - Sonic textures from other worlds, Analog signature sounds,  Cut-through-the-mix leads and silkily smooth pads.

FM TiNES is an electric piano library dedicated to the most beautiful FM electric pianos ever made.

The concert quality piano app.

The concert quality piano app.

Based on Hohner's iconic Corona Classic diatonic accordion, this virtual accordion app plays in all five of the most popular tones: EAD (Mi), FBbEb (Fa), GCF (Sol), ADG, and BbEbAb.

This synthesizer emulates male voice vowels in a unique way.

Designed to deliver authentic dub sounds and effects, iTALIZER at it's heart is a monophonic synthesizer paired with an authentic tape echo emulation.

Phase84 is a phase distortion synthesizer.