Meet DuoTrac: a multi-sensor motion tracker that allows athletes to keep a closer eye on their performance. This portable sensor analyzes your swing performance and footwork by taking a 4-dimensional view plane approach. You will be able to see club face path, face angle at impact, foot roll, and weight shift on your smartphone.
The app for this system lets you track and compare your results. You are provided with real-time coaching to improve your performance. More information is available on Kickstarter.