iOS Musician Apps (120) Supported Technologies is Inter-App Audio (IAA), Instrument Sounds is Keyboards

Colossus Piano sets a new standard in terms of realism, detail and overall quality of piano sounds on your iPad, iPhone and iPod touch.

Combo Organ Model V is a musical keyboard app for iPad/iPhone/iPod touch that simulates the electric transistor organ, is called a Combo Organ. It was a big success in the 1960s.

Continua is a three-oscillator / dual-filter six-voice virtual analog synth, with fully polyphonic modulation sources and built-in custom-designed effects, for everything from complex, evolving chill-out soundscapes to New Wave synth stabs.

Cube Synth is a groundbreaking new software instrument giving you the power and flexibility of additive synthesis together with easy editing and morphing capabilities.

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.

Dazibao is a polyphonic synthesizer programmed by an innovative interface : you create several tones, then you arrange them on several time lines.

DRC is a virtual analog polyphonic synthesizer that recreates the characteristic sound of an analog synthesizer.

Elsa is a retro style sampling keyboard with tempo based looping.

With EGSY01 you can create sounds, from modern ones to vintage analog ones, working with arpeggiator, step sequencer and FM, addictive and subtractive synthesis.

Electric Vintage is a virtual instrument based on a reproduction of a famous vintage electric piano (1976).

Englitina is an authentic-sounding English Treble Concertina for the iPad.

Esoteric Synth is a unusual generator of synthetic sound events. The synthesis is based on 5 oscillators which are intersected through an multiple amplitude modulation and multiple frequency modulation making  an high sound variability. This App is suitable to generate complex sound textures, glitches, noises, sound clouds, sound drones, point sounds and more.

Flynth is a synthesizer by Fingerlab, designed for musicality and easy use.

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

Galileo Organ 2 is a tonewheel and transistor organ app.

Groovebox is a free music studio app packed with synths and drum machines.

Mimicking the layout of Hohner's iconic chromatic button accordions (CBA), both B-System (Bayan) and C-System, this intuitive virtual accordion is easy to play and sounds exactly like the real instrument.

This intuitive virtual instrument features a super responsive  fingerboard that plays and sounds like the traditional instrument in the most common two-row tunings of B/C, C#/D, and D/G, as well as an extended B/C+ layout with four chromatic buttons on a partial third row.

Mimicking the layout of Hohner's iconic piano accordions, this intuitive virtual accordion is easy to play and sounds exactly like the real instrument.

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.