Frax HD has an in-app upgrade to the pro version. You'll need this upgrade to follow along with the Fractal video lessons.
Fractal That! Design: Designing Fabric the Fun and Easy Way!
Play with the Frax HD app on an iPad or iPhone and find designs to save for printing on fabric,a e.g modern whole cloth quilts, or whatever else you would like to use them for. The app is only $1.99 plus the in-app upgrade to the pro version is just $4.99.