iOS Musician Apps (54) Instrument Type is Synth, Free

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

Aparillo is an advanced 16 voice FM synth tailored for complex sound structures , majestic motions, moving and evolving soundscapes and atmospheres that are perfect for film, TV or games.

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

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

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.

Dedicated monophonic synth bass synthesizer.

Beatonal is an accessible music making app, enabling you to easily create and share your musical ideas using the built-in synthesizers and drum machine.

A strange noise-making device.

bent.fm is a full FM model of a circuit-bent synthesizer.

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.

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

Chiptunes Pro lets you make retro music the way it should be made - with chips. Build your circuit to lay down drum beats, basslines, and tunes.  No knowledge of electronics needed.

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.

Cyclop is a monophonic synthesizer. It does one thing very well: delivering cutting-edge digital madness at the low end of the frequency spectrum.

Endlesss is a free-to-use collaborative music studio with built in drums, synths, fx and much more. Easy to get started for the novice electronic musician with boundless opportunities for the seasoned creative.

Made for complex and organic sounds, Factory sports a big modulation matrix with all kinds of features to create a wildlife of sounds. A vast array of DSP is ready to play: Analog style oscillators and filters, but also different flavors of wavetable synthesis, Wavetable driven Waveguide resonators and a 3-FX-Chain in a dynamic signal flow.

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

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

Featuring an FM tone generator, FM Essential is a synthesizer app that provides for real-time synth performances and also lets you edit voices.