iOS Musician Apps (49) Instrument Sounds is Keyboards, Free

Accelerometer Synthesizer and Bluetooth MIDI Controller.

LCW-2 mono is a little complicated synthesizer based on ToyTone and implements several experimental functions.

iPhilicorda is an emulation of a vintage organ from the sixties, the Philicorda, created by the Dutch company Philips.

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

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

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.

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.

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.

Free iPad instrument featuring the classic sounds of famous 80s FM Synthesizers.

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

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

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

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

Mynth is the new intuitive and powerful synthesizer by Fingerlab.

Brought to you in partnership with Streetly Electronics, the inventors of the mellotron, Streetlytron includes a massive collection of 90 tapes, with 65 drawn from Streetly's Production Masters - exactly the same tapes that ship with their $8,000 M4000 unit. Completing the sample sets are our own very popular 'Caitlin Downie Soprano' and 'Clare Lindley Violin' collection, to offer a huge, rich selection of choral and string textures for your mixes.

SynthMaster One iPhone is KV331 Audio's first full blown synth app for iPhone. It's a powerful wavetable synth with an intuitive workflow. With its simple layout, rich wavetable/waveform content and inspiring factory presets library, designing new sounds with SynthMaster One iPhone is a joy.

Groovebox is a free music studio app packed with synths and drum machines.

Wotja X is a new cross-platform interface for the 'Wotja Generative Music System'.

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

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.