There is no question that smartphones can offer plenty in the form of fun and functionality. Now technology has advanced to the point where those sensibilities can intersect, giving users the best of both worlds in a single package.

Apps in the sports realm have usually catered to fans interested in following their favorite teams or fantasy leagues. But more and more are focusing on helping users become better players themselves by diagnosing form and technique on things such as a golf swing. They then provide data that can be used for practical and constructive criticism. Here's a closer look at how all this works:

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