Already rolled out into the popular crossfit app mywod , highfive experienced 44 % redemption rates -- and redeeming even meant entering an email address .
Highfive : advertising doesn 't usually get the pulses pumping for the active set , but highfive , a boston-based ad network for health and fitness apps turned a lot of heads during its presentation .
And with 25,000 health and fitness apps on the market -- 90 % of which are free -- highfive already has 10 paying customers , and seven of its nike + peers are integrating the ad platform into their apps .
