Sweatcoin

Rewards in kind rather than cash. Sweatcoin pays your steps in its own currency, sweatcoins, which you spend in its marketplace on gadgets, digital subscriptions, travel vouchers and discounts. Badges for daily goals and step-streak contests with friends give it a light social side. It is free on iPhone and Android and claims to run in the background without draining the battery. The marketplace and its offers are the whole point, so walkers who dislike being sold to will be happier with a plain step counter such as StepUp.