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

Modulin is a customizable synthesizer. It allows for unique personal expression while providing a wide spectrum of visual feedback.

SynthMaster One iOS is the mobile version of KV331 Audio's SynthMaster One software synthesizer.

With this instrument you can transform any sound into a playable musical instrument via a technique known as Granular Synthesis.

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

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

Galileo Organ 2 is a tonewheel and transistor organ app.

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.

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

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.

With the special lightweight version of SynthScaper LE you can easily create and modify your own multi-timbral pads and atmospheric soundscapes.

Triqtraq LE is a free limited edition of the critically acclaimed music app Triqtraq - Jam Sequencer.

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.

Esoteric Synth is a unusual generator of synthetic sound events. The synthesis is based on 5 oscillators which are intersected through an multiple amplitude modulation and multiple frequency modulation making  an high sound variability. This App is suitable to generate complex sound textures, glitches, noises, sound clouds, sound drones, point sounds and more.

Pure Synth® Platinum is a full-blown rompler/synthesizer for your iOS device. Neither the synth engine or the sample engine is an afterthought: Both engines are fully capable and feature-rich. The romper section contains a well rounded assortment of analog, synth, string, digital, and acoustic instruments.

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.

FM TiNES is an electric piano library dedicated to the most beautiful FM electric pianos ever made.

Just a Toy Synthesizer. Included: 2 Oscillators, LPF, Delay effector, Ribbon controller.

miRack is a Eurorack-style modular synthesizer. It aims to provide user experience and audio quality close to those of the real Eurorack hardware.

Lagrange synthesizer has two oscillators, a noise generator and two filters that can be selected from various algorithmic models.

Neo-Soul Keys® Studio 2 is the next evolution in electric piano sounds and effects from Gospel Musicians, which features a complete architecture overhaul using our new Pure Synth® structure and licensed VKFX effects.