A number of fitness-oriented apps popped up over the past few years and attracted users with ways to track their workouts. Whether it's counting calories or mapping out runs, people have embraced the concept by the millions.

Athletic companies have picked up on this. Last year we watched Under Armour purchase MyFitnessPal and Endomondo. Months later, Adidas scooped up Runtastic. Now ASICS is buying FitnessKeeper, the company behind Runkeeper, for an as of yet undisclosed amount.

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