- Cardio fitness score
- Built-in GPS
- Heart rate variability
- Alexa built in
- Stress management score
- Smart notifications
Fitbit ECG (Electrocardiogram) App
Compatible ECG app lets you assess your heart rhythm for atrial fibrillation—a heart rhythm irregularity—and share results with your doctor.
Stress management score
See how well your body's handling stress each day. Detailed score breakdown available with Premium
Heart rate variability
Tracks HRV–your time between heartbeats. A downward trend over multiple nights could potentially be a result of overtraining, lack of sleep, stress and more.
Relax breathing sessions
Do simple guided breathing sessions by following prompts on your wrist.
Active zone minutes
Tracks your time in heart rate zones so you get credit when you work harder. Workouts in cardio or peak zones earn double minutes.
Track your favourite exercises like runs, bike rides, weights, yoga & more and get live stats on your wrist.
Vibrant colour display
Bring your stats to life on a new colour touchscreen that’s two times brighter than Charge 4 in daylight and protected by Corning® Gorilla® Glass 3.
Up to 6-day battery life
Track all your moves for up to 6 days without having to stop for a charge with a long battery life
Small – fits wrists 129 – 175mm in circumference
Large – fits wrists 158mm – 209mm in circumference
Sensors & Components
- Multi-path optical heart rate tracker
- 3-axis accelerometer
- Electrical sensor to measure skin conductance
- Multipurpose electrical sensors compatible with ECG app and EDA app.
- Red and infrared sensors for oxygen saturation
- Skin temp sensor
- Ambient light sensor
- Built in GPS + Glonass
- Vibration monitor
Battery and Power
Battery life up to 7 days. Battery life and charge cycles vary with use, settings, and other factors; actual results will vary.
- Battery type: Lithium-polymer
- Charge time: (0-100%): Two hours
- Charge 12 minutes to get one day of battery life
- Saves 7 days of detailed motion data – minute by minute
- Saves daily totals for past 30 days
- Stores heart rate data at one-second intervals during exercise tracking and at five-second intervals all other times.
Up to 50 mètres. After getting the band wet, we recommend drying the band.
This watch includes a band made of a flexible material similar to that used in many sports watches, as well as an aluminium watch case and buckle.
Google account will be required.
The Fitbit app is compatible with most popular phones. To set up and use your Fitbit products and services, you must install the Fitbit app on a compatible device running one of the following operating systems:
- Apple iOS 14 or higher.
- Android OS 8 or higher. See additional tips for Android phones.
Syncing range: Up to 9m
- Certain features like smartphone notifications may require Android 8+.
- Syncing requires Bluetooth® LE, an internet connection and location permissions granted on the phone