Founded in October 2007 by James Park and Eric Friedman, Fitbit makes a range of simple, colorful devices, many of which are worn as wristbands, for counting steps, measuring sleep activity and monitoring workouts. Fitbit also develops software for smartphones and the Web to collect data on the user and display workout stats and training tips. As the first company of its kind to enter the market at a large scale, Fitbit is credited with bringing wearable fitness trackers closer to the mainstream, selling them at stores such as Best Buy and marketing not just to the tech-savvy or athletes, but anyone interested in tracking their physical activity.