While you could, up until now, run Pixelmator for iPad on the iPad Pro, it was not specifically optimized for either Apple’s new tablet or Pencil. Now it is.
Pixelmator today released version 2.2 of its mobile app, added features targeted to the new Apple devices, and augmented iOS 9 compatibility on the iPhone.
This new version is designed to work with Apple’s 12.9-inch giant iPad, which gives you ample space to draw and paint with natural hand movements. Pencil support includes full palm-rejection with brushes optimized for pressure, tilt, and acceleration sensitivity.