Never stop moving with Fitbit Flex. Wear this slim, stylish device all the time and get the motivation you need to get out and be more active. It tracks steps, distance, and calories burned and shows you how youÕre stacking up against your daily goals. At night, it tracks your sleep cycle, helps you learn how to sleep better, and wakes you silently in the morning. Access your stats anytime on your computer, tablet, or from smartphones Ð both iPhone and Android. Flex is your perfect companion, and stays with you everywhere - even in the shower.