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Screenshots

  • FM20 screenshot 1
  • FM20 screenshot 2

About FM20

An Audio Unit (AUv3) hybrid FM / VA synthesizer. 4 operators. 8 algorithms. 2 Virtual Analogue filters. Unstable by design. FM at the core. Virtual analog filters to shape, push, and break it. LFOs for motion. ADSRs for control. Metallic. Dense. Evolving. Sometimes predictable. Mostly not. AUv3 for DAW integration. Standalone app with 16-step sequencer. Build. Modulate. Repeat.

What’s new

Version 1.0.2 · Updated April 28, 2026

Added polyphony

App privacy

The developer, Paul Betowski, reported these privacy practices to Apple.

Data Not Collected

The developer does not collect any data from this app.

Alternatives to FM20

Looking for apps like FM20? Here are 6 similar apps on the App Store. The highest rated is SideChain AUv3 (5.0/5).

FM20 vs. alternatives
App Rating Price Last updated Compare
FM20 5.0 / 5 (2 ratings) 5.99 USD April 28, 2026
SideChain AUv3 5.0 / 5 (1) 2.99 USD Apr 14, 2026 Compare
Tapko 5.0 / 5 (2) 4.99 USD Sep 28, 2026 Compare
DynaSynth 5.0 / 5 (3) 2.99 USD Mar 24, 2026 Compare
SpiceCore – 22.99 USD Aug 30, 2026 Compare
Tonebank 4.7 / 5 (3) 14.99 USD Apr 14, 2026 Compare
dh slice 5.0 / 5 (1) 9.99 USD May 27, 2026 Compare

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