The Elite Interval Training app for Windows 8.1 will help you create, organize and execute your interval training workouts with ease. Its intuitive features allow you to create individual exercises or bundle them all together in complete workouts to achieve great results. What is more, you will never miss a beat thanks to the perfectly aligned audio cues which will guide you to a flawlessly executed interval training workout. See the app in action - http://youtu.be/hGml-82mTxM