iceGear Instruments has released NAMBU which they describe as a 6-operator FM synthesizer that supports AUv3 plug-ins.
A spokesperson told us, "NAMBU is a semi-modular FM synthesizer that incorporates modern ideas, rather than being designed to recreate the sound and workflow of a vintage FM synthesizer. It is not compatible with vintage FM synthesizers and you cannot import those patches into NAMBU."
Pricing and Availability:
$14.99 at the App store
From recent Brighton gig
More Feedback Machine is insane
With Kavus Torabi and Michael J. York