Korg releases M1 as an iOS App with similar features to the original M1 Digital Synthesizer classic “rompler” synth (from the “legacy” collection).
for it’s 20€ it adds filter resonance, the T-Series ROM content, Kaoss-Pad kind of control / 18x FX types.
and something called VCA Modulation
Appstore: KORG iM1 – KORG INC.
can be controlled from Korg “Gadget” Sequencer on the same iPad (was updated today as well).