iOS Musician Apps (227) Instrument Sounds is Keyboards

The Moog Model 15 App is the Moog modular synthesizer and synthesis educational tool.

SunVox is a small and fast cross-platform modular synthesizer with pattern based sequencer (tracker).

The BLEASS Alpha Synth is a virtual analog polyphonic stereo synthesizer inspired by classic analog synths and enhanced by the BLEASS’ very own musical and technical approach. 

NFM is an intuitive FM synthesizer with a streamlined interface.

A Simple Ad-Free Piano-like Musical Keyboard. Easy to Play, Good Response and Small Application Size. Just Play the Instrument. The app doesn't use sampled real sounds but use FM synthesis. It sounds like piano though it's false.

A famous vintage electric piano was recorded and lovingly hand edited by award-winning producers. The tines. The noise. The feel. The vibe. It’s all here.

Moebius Lab is a multimorphic sound processor which contains a synth, a varispeed stereo sample player, effects and LFOs that can modulate each parameter.

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. 

iPhilicorda is an emulation of a vintage organ from the sixties, the Philicorda, created by the Dutch company Philips.

Dagger is an analog modeling paraphonic synth with a big, raw analog sound.

Syntorial is a synthesizer training app, that will teach you how to program synth patches by ear.

High fidelity Synthesizer designed for generating Binaural beats and exploring alternate scales.

This virtual instrument is a crossover between a wavetable synthesizer and a granulating sample player specialized in generating vocal sounds.

TC-11 is the only fully programmable multi-touch synthesizer for the iPad.

Multilevel Interactive Sound Synthesizer. Up to 240 Frequency Modulation Oscillators or simple Wavetable Additive.

This is the official and the only Chamberlin app with sounds from the original library. It contains 8 sounds from both the Chamberlin library and an emulation of the sound characteristics of the M1 Chamberlin.

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

Accelerometer Synthesizer and Bluetooth MIDI Controller.

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.