The free Fitbit app is designed to work with Fitbit activity trackers and smart scales.GET ACTIVE. EAT BETTER. MANAGE WEIGHT. SLEEP BETTER.-Wirelessly SYNC (beta) your Fitbit Flex, One or Zip tracker with your Android device. See list of supported devices at www.fitbit.com/devices-Track your DAILY GOALS and progress over time for STEPS, DISTANCE, CALORIES BURNED and more-LOG FOOD to see how many CALORIES you consume each day, and manage your WEIGHT over time-COMPETE and compare stats with your Fitbit FRIENDSLearn more about Fitbit activity trackers and smart scales at www.fitbit.com