It's really unfortunate because this app is a great idea, and the movement tracking works great and everything, but many of the videos in their catalogue don't work at all. To add insult to injury, an ad pops up any time you close out of a video, whether or not you were actually able to watch it. And the videos that you can actually watch are all in pretty sub-par visual quality. That, and the fact that they force you to write a review to even watch any videos (they tell you it needs to be 5 stars; it doesn't), makes this app a pretty annoying experience. Would not recommend.