Play and program a synthesizer with presets, a sequencer, MIDI input and effects.

What it does

Play and program a synthesizer with presets, a sequencer, MIDI input and effects. The developer describes fully free, open-source use without ads or in-app purchases.

Pricing: is AudioKit Synth One Synthesizer free?

US App Store download: Free (USD), checked 2026-09-23. Open-source software; hosted services or other add-ons may have separate charges.

Screenshots

Developer-provided iOS screenshots.

Synthesizer controls above an on-screen keyboard.

Step sequencer and mixer for a synth pattern.

Filter and envelope controls for a patch.

Arpeggiator and modulation controls above the keyboard.

Features

Hybrid analog/FM synthesizer

Create sounds with a hybrid analog and FM polyphonic synthesizer.

Developer’s App Store feature description (iOS)

300+ presets

Start from more than 300 presets created by professional sound designers.

Developer’s App Store feature description (iOS)

Five oscillators

Build patches with DCO, FM, sub, and noise oscillators.

Developer’s App Store feature description (iOS)

16-step sequencer

Sequence patterns with a vintage-style 16-step sequencer.

Developer’s App Store feature description (iOS)

MIDI input

Control the synthesizer from a MIDI keyboard or supported inter-app connection.

Developer’s App Store feature description (iOS)

Sources & verification

AudioKit Synth One Synthesizer: developer's App Store listing (US)Primary source
Developer’s App Store feature description (iOS)Primary source

Last verified: 23 September 2026. Features not listed here may be unverified.

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