I am a student of the style that the app attempts to teach, that being Shorin Ryu, traditional Okinawan karate. The app is good to review stances, blocks, strike, and katas, but it won‘t teach you them. At least not good enough. The app is a great way to review what you have already learned. However, if you are looking to learn karate I recommend going to a dojo near you and learning from a real Sensei, a Sensei will do a much better job of teaching you and making sure you donut right than any book or app.