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

CHAiOS SYNTH 2 is a synthesizer/melody generator that creates unique melodies with just one tap.

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.

GeoShred Play is an expressive musical instrument with a multi-touch performance surface, coupled with an advanced physical model of a guitar.

ToyTone is simple synthesizer. Select waveform, and move the slider. Tap the pad at bottom, you can play.

Droneo is a synthesizer which drones with various timbres and precise intonations that blur the distinction between tones, timbres and chords. Its drone is great for meditation, centering, and calming,  walking and biking, but also can be set up for discordant noise and insect-like buzzing and chirping.

Epic 64-voice Virtual Analog / PCM iPad Synth. Inspired by the Digital Synths of the 80s and 90s.

GeoShred is an expressive musical instrument with a multi-touch performance surface, coupled with an advanced physical model of a guitar.

Xynthesizr is a streamlined yet capable 32-step matrix sequencer/monotimbral synthesizer with generative features and MIDI.

miRack is a Eurorack-style modular synthesizer. It aims to provide user experience and audio quality close to those of the real Eurorack hardware.

The Minimoog Model D App is a mobile transmutation of the world’s first portable synthesizer, the Minimoog Model D®.

PixelWave is an experimental synth with old school pixel interface.

Agonizer is a monophonic synthesizer designed in collaboration with YouTuber and synth bass expert Jakob Haq of haQ attaQ

Groove Rider GR-16 is a professional step-sequenced groove box, inspired by professional hardware drum machines and rhythm boxes.

TweakyBeat is a drum machine synth.

Hexaglyphics is a 13-bit noise generator with an interface based on an original alphabet for hexadecimal values.

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

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

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

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.