iOS Musician Apps (128) Supported Technologies is Inter-App Audio (IAA), Instrument Sounds is Keyboards

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

Pure Synth® Platinum is a full-blown rompler/synthesizer for your iOS device. Neither the synth engine or the sample engine is an afterthought: Both engines are fully capable and feature-rich. The romper section contains a well rounded assortment of analog, synth, string, digital, and acoustic instruments.

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

This app reproduces the functionality of Casio’s best-selling CZ-series models, such as the CZ-101 (first released in 1984), and also includes new functions.

This fully featured monophonic synthesizer can create a huge variety of sounds. Fat basses, stabby leads, glitchy noises, old style chip tune sounds (including arpeggios), weird percussion, you name it.

This synthesizer emulates male voice vowels in a unique way.

Phase84 is a phase distortion synthesizer.

When a punchy, fat sound is demanded, look no further. iProphet recreates the unique sound of the classic Sequential Circuits Prophet VS synthesizer.

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.

The concert quality piano app.

The concert quality piano app.

Baervaag brings FM synthesis to the masses! An easy to use but still tweakable synthesizer, accessible to everyone.

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

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

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).

SynthQ is a subtractive synthesizer with a customizable interface.

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

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.

SpectrumGen is a spectral synthesizer with a simple and effective user interface.