Fitbit Charge 5 Graphite/Black FB421BKBK

Fitbit Charge 5 Graphite/Black FB421BKBK

FITBIT FB421BKBK

Meet our most advanced fitness & health tracker with tools like an on-wrist ECG app for heart health, EDA Scan app for stress management and more.

Stress Management Score

Get a handle on your stress. Your daily Stress Management Score makes it easy to see if your body is showing physical signs of stress. Higher score? You’re showing fewer signs of stress, keep up the good work! Lower score? Time to change things up and find better balance—try meditation or going for a walk.

EDA Sensor

Enjoy the freedom to improve how you are managing your mental and physical well-being anytime, anywhere. By doing regular EDA sessions on your Charge 5 so you can understand how your body reacts to stress over time, you can start to build a mindfulness practice and take steps to improve your mental well-being. Build up your personal mindfulness routine using your EDA app. Clinical studies have shown that mindfulness-based practices, such as meditation, are effective at helping to reduce stress.

Fitbit ECG (Electrocardiogram) App (Coming Soon)

Keep track of your heart health with a compatible ECG app that assesses your heart for atrial fibrillation—a heart rhythm irregularity—and share the results with your doctor.

The Fitbit ECG app is only available in select countries. Not intended for use by people under 22 years old. See fitbit.com/uk/ecg for additional details.ECG App Coming Soon.

Built-In GPS

See your real-time pace & distance without your phone using built-in GPS during outdoor runs, rides, hikes and more, then see a map of your workout route in the Fitbit app. If you have your phone nearby, Charge 5 connects to your phone's GPS to help extend your tracker's battery. 1

Workout Intensity Map

After outdoor exercise with GPS, check your workout intensity map in the Fitbit app to see your pace and heart rate zones throughout your route and learn where you put in the most effort.

24/7 Heart Rate Tracking with Pure Pulse

Track calorie burn and optimise workouts with Pure Pulse continuous heart rate tracking, then see your resting heart rate trends and cardio fitness level (VO2 Max) in the Fitbit app.

Active Zone Minutes

Get the results you want from every workout. Active Zone Minutes uses your heart rate to guide you toward your desired intensity level—then helps keep you there.

(INTL) Get the results you want from every workout and see how all your activity adds up over the week. Active Zone Minutes uses your heart rate to guide you toward your desired intensity level—then helps keep you there. Check the app to see if you’re reaching the World Health Organisation’s recommendation of 150 minutes of moderate activity per week. Short on time? Vigorous exercise earns you double minutes.

Cardio Fitness Level

Get to know your VO2 max—a measurement of how well your body uses oxygen when you’re working your hardest. Keep tabs on your score to see how you improve over time.

Oxygen Saturation (SpO2) Monitoring

Track SpO2—the level of oxygen in your blood—to help you learn when there may be an indication of important changes in your overall wellness. 1

Skin Temperature Tracking

Stay informed and in tune with your body using Charge 5’s nightly skin temperature tracking. When your temperature varies from your baseline in your Health Metrics dashboard, you’ll be more aware of potential signs of changes in your body. Your sleep patterns, menstrual cycle, the room temperature, potential onset of fever or even your bedding can cause changes.

Not available in all markets. Significant changes in ambient temperature may negatively impact skin temperature tracking.