iOS Musician Apps (115) Supported Technologies is Inter-App Audio (IAA), Instrument Sounds is Keyboards

Additive synthesis is a sound synthesis technique that creates timbre by adding sine waves together. The timbre of musical instruments can be considered to consist of multiple harmonic or inharmonic partials or overtones.

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.

Tardigrain is a granular synthesizer. Sounds are created by taking smaller fragments of a sample and playing them back in a non linear fashion, with settings for grain size, direction, step size and more.

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

Mynth is the new intuitive and powerful synthesizer by Fingerlab.

Shape is a polyphonic synthesiser allowing the user to draw the shape of the oscillator waveform.

Phawuo is a monophonic virtual-analog synth with "dirty" oscillators. Good for bass sound and effects.

Wotja X is a new cross-platform interface for the 'Wotja Generative Music System'.

Lagrange synthesizer has two oscillators, a noise generator and two filters that can be selected from various algorithmic models.

Redshrike is a polyphonic synthesizer that combines a resonator designed to make more complicated sound creation and subtraction synthesis with an FM oscillator that creates violent distortion.

Mersenne is a melodic percussion synthesizer that combines two FM synthesis modules, a noise generator and a resonator.

Lorentz is not only a live-oriented analog modeling synthesizer, but also has a resonator that makes metallic and aggressive sounds.

Laplace is a physical-modeling synthesizer based on resonator synthesis that makes it easy to create bowed string, plucked string, blown pipe and metallic sounds.

Pure Piano is a professional, multi-sampled concert grand piano with a unique Morph Pad that allows you to explore a multitude of sounds ranging from mellow and intimate tones to surreal, cinematic textures.

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 matrix-controlled arpeggiator designed to play with your thumbs.

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

ID700 is a software synthesizer based on the voice architecture of the Buchla 700. Sound generation is achieved primarily via FM synthesis and waveshaping.

SynthMaster One iOS is the mobile version of KV331 Audio's SynthMaster One software synthesizer.

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