Pilates Interactive ($5, iOS): This app guides you through mat exercises with high-quality video featuring master teacher Rael Isacowitz. Follow the professional routines or build your own.
Yoga & Pilates with Kristin McGee (Free with in-app purchases, iOS and Android): While the app itself is free, all the content you'll actually want requires in-app purchases. But consider it a private Pilates instruction as you'll get guidance on mastering moves straight from a celebrity trainer.