Facebook may already be tracking your usage to serve you ads, but how would you feel if it was able to log your movement? That's exactly what could be on the cards after the company confirmed it's bought Moves, the fitness-tracking app that records your daily activities using your smartphone. On its blog, the Moves team says it will "work on building and improving their products and services with a shared mission of supporting simple, efficient tools for more than a billion people." Zuckerberg and co. intend to keep the iOS and Android apps independent, and there are currently no plans to "commingle data with Facebook." The social network employs a similar policy with Instagram and Whatsapp, which is no surprise given their huge user numbers and combined $20 billion price tag.