FitBit

Fitbit is a company based in San Francisco, California, USA, that specializes in wearable, activity trackers that aid in increasing fitness and losing weight. Founded in 2007 by James Park and Eric Friedman, their products include wristbands, watches, wireless headphones, smart scales and other electronic accessories.

They have also developed a popular app and accompanying online community in which people can share their weight goals, challenges, and successes.