iOS Musician Apps (177) Supported Technologies is Audio Unit (AU), Type is Instrument

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

7Xwave - a 7 track sample sequencer with synthesizer & animatable modulation features.

AASamplePlayer turns any sound file into a playable instrument, just load it up with your DAW (like GarageBand), batch load your favorite sample packs and have fun :)

Accordion Vintage is a virtual sampled instrument based on an original Italian accordion made in Castelfidardo in the 60s years.

The hybrid synthesis algorithm on which Addictive Pro is based provides you with efficient means for easy control of complex sounds far beyond usual sound synthesis methods.

Additive synthesis is a sound synthesis technique that creates timbre by adding sine waves together. The timbre of musical instruments can be considered to consist of multiple harmonic or inharmonic partials or overtones.

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

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.

This app is a portable multitrack audio and MIDI recording studio featuring virtual instruments, editing with unlimited undo/redo, mixing, real-time effects, automation and much more!

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

Express yourself. Create your signature retro piano sound. Simple controls allow you to easily create an emotional vibe for your next hit record.

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

AudioLayer is a full featured open standard audio multi-sampler pushing the boundaries beyond what has been available even in the desktop music production worlds.

You can think of auGEN X in two ways:  first, it is a handy utility for making audio test sounds, and second, it is a performable creative sound design tool.

Baervaag brings FM synthesis to the masses! An easy to use but still tweakable synthesizer, accessible to everyone.

Dedicated monophonic synth bass synthesizer.

Portable Music Production Studio : create beats, compose whole tracks, sample, record, sequence, perform, mix and arrange your own music.

bs-16i is a 16 multi-timbral playback sampler. It supports SoundFont and DLS (Downloadable Sounds, and can be used for keyboard instrument, MIDI sound module, and MIDI player.

The BLEASS Alpha Synth is a virtual analog polyphonic stereo synthesizer inspired by classic analog synths and enhanced by the BLEASS’ very own musical and technical approach. 

BLEASS Granulizer generates short samples (‘grains’) from different input signals by modulating different parameters which you can visualize thanks to a 3D Visualizer.