Doshi-Kai Matsuyama's Shotokan Karate Shotokan Kata Apps for the Android, iPhone and iPad from DoShiKai The benefit over a YouTube video (and we have these, too, posted at doshikai.net) is the ability to easily stop and go back just one move, or work on 2-3 moves over and over again. This approach offers students a way to learn the movements of a kata at their own pace, or the ability to review a kata outside the dojo, then be able to practice it in class without worrying about the moves or the sequence, thus allowing more attention in the class to correct performance of the techniques. Shotokan kata 平安初段 "Heian Shodan" performed by Frank Paolino. Heian Shodan Shotokan karate kata shows the kata move by move by swiping a finger. It also lets you look at the kata from all four sides to see the moves from different directions. With your Android device, iPhone, iPod touch or iPad in your hand, you can review the moves of the kata in slow motion, then practice at full speed. There are buttons to repeat a move, go backwards and start over. Shotokan kata 平安三段 "Heian Sandan" performed by Greg Cumings. Heian Sandan Shotokan karate kata shows the kata move by move by swiping a finger. It also lets you look at the kata from all four sides to see the moves from different directions. With your Android device, iPhone, iPod touch or iPad in your hand, you can review the moves of the kata in slow motion, then practice at full speed. There are buttons to repeat a move, go backwards and start over.