iOS Musician Apps (50) Instrument Sounds is Keyboards, Free

Chiptunes Pro lets you make retro music the way it should be made - with chips. Build your circuit to lay down drum beats, basslines, and tunes.  No knowledge of electronics needed.

Nanologue boasts a wide scope of inspiring sounds and professional sound effects, sporting a straightforward multi-touch interface and a great-sounding monophonic synthesizer.

Dandy is a sampler/synthesizer for iPhone inspired by Dandy Desmonds composition “Magnetic Loops for 15 Tape Decks” from 1938, which is one of the earliest known works of electroacoustic music.

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.

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.

Each of the 2 oscillators offers a selection of 5 waveforms: sawtooth and pulse waves are here, along with noise, triple saw and triple FM waves. There's also an additional sub-oscillator strapped into the master section for added oomph.

iTuttle is a Subtractive Monophonic/Paraphonic Synthesizer.

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

Featuring an FM tone generator, FM Essential is a synthesizer app that provides for real-time synth performances and also lets you edit voices.

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