iOS Musician Apps (115) Supported Technologies is Inter-App Audio (IAA), Instrument Sounds is Keyboards

Kauldron is a synth with new modeling technology, combined with features help you create aggressive synth sounds full of rich analog textures with the fewest knob tweaks.

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.

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

ShockWave is a monophonic Synthesizer designed to bring modular style workflow to the world of iOS & AUv3 plugins.

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

Thanks to it's true VA synthesis engine, the use of analog-modelled non-linear filters and extensive modulation options, Flowtones sounds warmer and more analog than digital romplers and wavetable-based synths.

Mellowsound is an emulation of a legendary instrument, a keyboard sampler from the 60s used by many famous artists like the Beatles, David Bowie, Radiohead and many others, this mythic instrument is called The Mellotron.

Mynth is the new intuitive and powerful synthesizer by Fingerlab.

SunVox is a small and fast cross-platform modular synthesizer with pattern based sequencer (tracker).

Arctic Pro Synthesizer / Vocoder is a modern subtractive synthesizer.

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

The Minimoog Model D App is a mobile transmutation of the world’s first portable synthesizer, the Minimoog Model D®.

The Moog Model 15 App is the Moog modular synthesizer and synthesis educational tool.