Please check out the latest FabulousPanda app available free for iPhone and iPad!
fabulouspanda.com/destijl/

This is a free colouring app inspired by the De Stijl art movement, with an in-app art generator (in app purchase required) that allows you to generate extra colouring pages to presets and parameters you set.

The in app purchase also unlocks our Mac app, Unlimited Colouring Art! And vice versa.

Please feel free to post here if you need help using the app or just to share your experiences with it, I'd love to see some of the artworks that get made in the app!