Sweatcoin is a free mobile application that incentivizes physical activity by converting users' steps into a virtual currency called 'sweatcoins.' These sweatcoins can be spent on a variety of products and services available in their marketplace, which include items like high-tech shoes, iPhones, Apple Watches, and even anti-gravity yoga classes. Users also have the option to donate their sweatcoins to various environmental, humanitarian, and animal preservation causes. The value of a sweatcoin is derived from partnerships with brands that want to connect with health-conscious audiences and insurers promoting healthier lifestyle choices.