Sleep is critical to your health—it can help curb food cravings, fight aging and depression, reduce your risk of heart disease and more. Use Fitbit’s advanced tools to help you sleep better, have more energy and improve your health.
Working to fit a sleep lab in a sensor
Our heart rate sensors and motion detectors work behind the scenes to track your sleep. Just wear your tracker or watch to bed, let Fitbit work its magic, then see your sleep stats and insights right in the app.
Use your heart to reveal the quality of your ZZZs
Fitbit trackers and watches use your sleeping heart rate, movement and more to measure your time spent in each sleep stage and give you a personalized Sleep Score that shows how well you slept. Plus, view your trends over time in the app, and see how your stats compare to others.*
Uncover the power of light, deep & REM sleep
Each night your body cycles through different sleep stages based on your heart rate, and getting enough time in each one is key to feeling refreshed. Light sleep strengthens memory and learning. Deep enables physical recovery. REM helps with strategic thinking and creativity.
Track your sleep each night and trends over time.
Ease into your morning with a silent alarm.
Understand your sleep with notes on your night.
Set goals, get bedtime reminders and more.
Wear your tracker or watch at night to automatically record your sleep.
Make mornings more peaceful by setting a silent alarm and waking up with a quiet vibration on your wrist.
Wake up feeling more rested by having your silent alarm go off during the optimal stage of sleep.*
Track your time spent in light, deep and REM sleep plus time awake.*
Quickly understand how well you slept with a personalized score based on heart rate, restlessness and more.*
Create a schedule that helps you stick to a consistent bedtime and wake-up time—the key to better rest.
Stay on track with friendly bedtime reminders that notify you when it’s time to turn in for the night.
Learn how your sleep is related to activity, mood and more, plus get tips to improve your night.
10,000 steps a day encouraged you to get moving, and now Active Zone Minutes is helping you optimize those movements. By tracking time spent in specific heart rate zones, Active Zone Minutes helps you work out smarter and more efficiently.
Reaching the recommended activity guidelines
Active Zone Minutes counts your time spent in any heart-pumping activity. Your default goal is based on the widely accepted recommendation of 150 minutes of moderate activity or 75 minutes of vigorous activity per week.**
Work out smarter
With Active Zone Minutes, the harder you work, the more credit you get. 1 minute in the fat burn zone earns 1 Active Zone Minute, and 1 minute in the cardio or peak zone earns 2 Active Zone Minutes. You put in the work, and we’ll do the math!
A focus on personalization
Your target heart rate zones are personalized based on your age and resting heart rate, giving you a more accurate understanding of how to optimize your effort.
Zone notifications keep you in the know
When you’re in an exercise mode, your Fitbit tracker or watch^ buzzes to let you know when you enter and exit a heart rate zone: 1 buzz for the fat burn zone, 2 buzzes for the cardio zone and 3 buzzes for the peak zone.
On-wrist notifications and celebrations keep you going.
Know how hard you’re working during any heart-pumping activity.
Heart rate zones are personalized for your age and fitness level.
Tracking Active Zone Minutes helps you reach the recommended activity guidelines.
Earn Active Zone Minutes whenever you get your heart rate up, whether you're in an exercise mode or not.
View Active Zone Minutes on your wrist to see how close you are to reaching your daily goal.
Buzzes on your wrist let you know what zone you’re in without having to take your eyes off your exercise.
Stay motivated to reach long-term goals with daily and weekly celebrations.
Understanding your heart is incredibly valuable and a key indicator of overall cardiovascular health. And it’s easier than ever with PurePulse™, the world’s first automatic, continuous heart rate tracking technology on your wrist.
Heart rate tracking made for every day
In the past, heart rate tracking was expensive, awkward and uncomfortable. With the invention of PurePulse, we made it accessible to anyone. Inspired by a thimble-sized sensor used in hospitals, we conducted extensive research to make wrist-based heart rate tracking work in all types of environments.
Photoplethysmography: a long word with a short explanation
We use light to measure blood flow. As your heart beats, the volume of blood in your wrist rises and falls. Blood absorbs light, so a sensor shines a light onto the skin while light detectors called photodiodes measure how much light is being absorbed. The rise and fall of the absorption signal represents each heartbeat. This tells you how many times your heart is beating per minute.
Innovation backed by research
In a number of external studies worldwide, PurePulse™ technology has surpassed industry expectations. And over 50 patents related to PurePulse™ technology have been awarded to Fitbit’s heart rate innovation in the process.
Use heart rate zones to maintain the right intensity.
Use your heart rate to track sleep stages.
Get a more accurate measure of calories burned.
Do guided breathing sessions personalized for your heart rate.
Measure heart rate when your body’s at rest to assess your heart health and see resting heart rate trends.
Use real-time heart rate zones to understand your effort during workouts.
Better understand how fit you are without the need for a strenuous VO2 Max test
Relax anywhere with personalized breathing sessions based on your heart rate.
Aim higher with a Premium membership
Get more guidance toward your goals with personalized insights, exercises and more.