iOS Musician Apps (120) Supported Technologies is Inter-App Audio (IAA), Instrument Sounds is Keyboards

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.

The unique dynamic wavetable synthesis allows you to explore an unprecedented wide range of sonic territory.

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

Combine 3 oscillators and a noise envelope to produce bright 80s-style synths, deep rich bass, punchy kicks and snares, a variety of screaming leads, and even breathy percussion.

Arctic Pro Synthesizer / Vocoder is a modern subtractive synthesizer.

A matrix-controlled arpeggiator designed to play with your thumbs.

Arpeggist is a MIDI Note arpeggiator with a very flexible step matrix editor for programming and a unique “rolling dice” random arpeggio generator.

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

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

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.

AutoPad is an app for musicians that allows you to play ambient pad loops.

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

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

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.

The second best sounding piano app in the App Store (after "Colossus Piano")!