Moog update their app to version 1.1.1 - now compatible with all iOS hardware 11/03/11
Moog tells us that Version 1.1.1of Filtatron is a universal build for iPad, iPhone (all versions), and iPod Touch.
They say that it features glorious hi-res graphics for iPad and Retina displays. Pricing and Availability:
Filtatron costs $7.99