iOS Musician Apps (149) Supported Technologies is Audiobus, Instrument Sounds is Keyboards

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

AudioKit Synth One is a completely free & open-source professional iOS Synthesizer. 

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

Play with the sound of a full cathedral organ, created by award-winning sound designer Kurt Ader.

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

Combine 3 oscillators and a noise envelope to produce bright 80s-style synths, deep rich bass, punchy kicks and snares, a variety of screaming leads, and even breathy percussion.

LayR is a polyphonic, multi-timbral synthesizer for iPad and iPhone, delivering up to 256 voices of rich, multi-layered and textured sounds.

Poison-202 is a professional Vintage Midi Synthesizer.

Synclavier Go! is an authentic re-creation of the Synclavier® II Digital Synthesizer of 1980.

VOSIS is a synthesizer that uses scanned synthesis of greyscale image pixel data from photos or live video input. It is also a tool for image audification/sonification and visual music performance.

Galileo Organ 2 is a tonewheel and transistor organ app.

Kauldron is a synth with new modeling technology, combined with features help you create aggressive synth sounds full of rich analog textures with the fewest knob tweaks.

Harness the enormous power of 8 polyphonic synths: meet KASPAR Supersynthesizer.

Each of the 2 oscillators offers a selection of 5 waveforms: sawtooth and pulse waves are here, along with noise, triple saw and triple FM waves. There's also an additional sub-oscillator strapped into the master section for added oomph.

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

7Xwave - a 7 track sample sequencer with synthesizer & animatable modulation features.

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

Borderlands Granular uses a technique called granular synthesis, which involves the superposition of tiny fragments of sound, or “grains," to create complex, evolving timbres and textures.

Create your own Blues tracks in minutes with this special dedicated Blues edition of SessionBand – the chord-based audio loop app.