Sadly their iPad apps seem to be mostly 'abandonware'. Unconfirmed, but I heard they were developed by a contractor whose contract has long since expired. I have a feeling when they start to be come incompatible with the latest iOS versions they'll be pulled completely. Sad really because the latest iPads are hugely powerful and capable of running full-blown DAWs and plugins.
When the M1 versions of the Arturia apps eventually materialise, you might then have some hope of parity between the desktop and iPad apps, because M-series Macs and iPads run fundamentally the same processor.
