iOS Musician Apps (132) Supported Technologies is Inter-App Audio (IAA), Instrument Type is Synth

Quanta is a six-voice granular synthesizer for iOS11+ in both standalone (with Inter-App Audio) and AudioUnit V3 formats.

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.

Pure Acid is a bassline synthesizer and drum machine in one app.

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.

Poison-202 is a professional Vintage Midi Synthesizer.

Pixound provides a deep musical experience that lets you instantly create music using any picture.

PixiTracker 1BIT is a simple and fun tool to quickly create musical sketches, chiptunes and experiments with TRUE 1-BIT SOUND (like on old microcomputers).
No musical knowledge required.

PixelWave is an experimental synth with old school pixel 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.

Photophore is a unique instrument that uses flocks of up to 100 sound generators to create rich, organic synthesizer sounds.

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

PhaseRings is a musical instrument for performing expressive music with touch gestures. Anyone can create a beautiful piece of music with our sound schemes and generative composition engine.

Phase84 is a phase distortion synthesizer.

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

Mynth is the new intuitive and powerful synthesizer by Fingerlab.

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

mood is a personal interpretation of the legendary Analog Synthesizer by Eugenio Giordani

MonoStereo Synthesizer is a free full-featured analog mono synth with oscillator panning.

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

Modulin is a customizable synthesizer. It allows for unique personal expression while providing a wide spectrum of visual feedback.