iOS Musician Apps (56) Instrument Type is Synth, Free

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.

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

LoAdKer is a novel rhythm event generator that is based on fractal sequences.

ChowKick is a kick drum synthesizer based on creative physical modelling of old drum machine circuits. The synth contains
useful parameters for adjusting the tone and fundamental frequency of the synthesized kick drum.

Accelerometer Synthesizer and Bluetooth MIDI Controller.

4Waves Synth AUv3 is an easy to use synthesizer with a powerful sound.

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

Primer is a synth equipped with the most essential controls and nothing more.

Make music in seconds. Share, remix and collaborate with music makers all over the world.

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

Explore unreal synthesis with the most unique performance control on iOS! TC-Performer presents a multi-touch performance environment unlike any other synthesizer.

Play the vibe. Hear the magic. Syntronik is IK’s cutting-edge synthesizer that features the sound of the most iconic machines to ever grace the planet.

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

Fed up with standardized presets and instruments? Feel lost in overcomplex filters and effects? Don’t wanna sound like everyone else? BLEASS is just the right instrument for you: it unleashes your inner musical creativity by bringing music production and performance to its very core: play, perform, compose beats and melodies in a new yet intuitive way thanks to its multitrack sequencer, synthesizer and drum machine.

AutoArp turns your iPhone (or iPod Touch) into a musical instrument that is halfway between a traditional auto-harp zither and an arpeggiated analogue-style synth.

Spectrum is a collection of Audio Unit ports of popular eurorack synthesizer modules.

HOWL is a simple vocoder/synthesizer. It uses formants to simulate the human voice and a pitch-space keyboard to help you find interesting melodies.

iTuttle is a Subtractive Monophonic/Paraphonic Synthesizer.

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