About this item
- Stress Management Score – See how well your body’s handling stress each day. Detailed score breakdown available with Premium.
- EDA Scan App – The on-wrist EDA Scan app detects electrodermal activity—which may indicate your body’s response to stress—and reveals a graph in the Fitbit app to illuminate it.
- Reflections – Easily log your mood, from very stressed to very calm, on Sense after an EDA Scan session or in the Fitbit app to help you reflect on what makes you feel your best.
- ECG app for heart rhythm assessment – Compatible ECG app lets you assess your heart rhythm for atrial fibrillation—a heart rhythm irregularity—and share 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 here for additional details.
- Irregular Heart Rhythm Notifications – Wear Sense when you’re still or sleeping to check for signs that may be atrial fibrillation (AFib). If you get notified, you can share this information with your healthcare provider. Only available in select countries and with select Fitbit products; not intended for use by people under 22 years old or with known atrial fibrillation. See here for additional details.
- On-Wrist Skin Temperature Sensor – Sense tracks your skin temperature each night to show how it varies from your personal baseline, so you can be aware of your trends 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 well-being. See it at a glance on your wrist with an SpO2 clock face or swipe to your Today dashboard for average levels & trends over the past week. Head to the app to find those weekly levels in your Health Metrics dashboard, or discover more with Premium: trends from the past month alongside your personal ranges to help you interpret the data.***
- High & Low Heart Rate Notifications – Your heart rate is a key indicator of your health, so Sense keeps you informed when it’s above or below your threshold.
- 24/7 Heart Rate Tracking with PurePulse® 2.0 – With an all-new multipath sensor, Sense delivers PurePulse 2.0—Fitbit’s 24/7 continuous heart rate tracking for exercise, sleep tracking and everything in between.
- Breathing Rate – Automatically measure your breathing rate while you sleep to help you understand your wellness and learn if there are signs of significant changes. View your nightly average and trends over the past week in the Health Metrics dashboard.‡
- Heart Rate Variability – Track heart rate variability (HRV)—the variation of time between each heartbeat— to see if your body is showing potential signs of stress, illness or fatigue. View your nightly average and trends over the past week in the Health Metrics dashboard.‡
- Sleep Stages & Sleep Score – See your time in light, deep and REM sleep and get a daily Sleep Score in the Fitbit app and on your wrist to better understand your sleep quality each night.
- Smart Wake – Set your Fitbit alarm to wake you with a quiet vibration during a lighter sleep stage to help you feel more refreshed.
- Sleep Mode – Snooze uninterrupted by using sleep mode to mute smartphone notifications and stop your screen from turning on at night. Set a schedule to turn sleep mode on automatically.
- Snore & Noise Detect – Find out if you’re snoring, or if there’s ambient noise in your bedroom—both of which can impact your sleep quality.
- Menstrual Health Tracking – Know your body better by using Sense and the Fitbit app to log periods, record symptoms, track your ovulation and discover patterns in your cycle.◆◆◆
- Daily Readiness Score – Do what’s best for your body with a Daily Readiness Score that shows whether you’re ready to work out or should prioritize recovery.â—†
- Built-In GPS – During outdoor runs, rides, hikes and more, use built-in GPS to see your pace and distance on Sense, then see a map of your workout in the Fitbit app.
- Workout Intensity Map—In App Only – After outdoor exercise, check your workout intensity map in the Fitbit app to see your heart rate zones throughout your route and learn where you put in the most effort.
- Active Zone Minutes – Active Zone Minutes help you make every minute count during workouts by buzzing your wrist when you enter your personalized target heart rate zone.
- Heart Rate Zones – During workouts, get real-time stats on screen to see whether you’re in fat burn, cardio or peak zone, so you can dial the effort up or down according to your goals.
- 20 Goal-Based Exercise Modes + SmartTrackâ„¢ – Choose from up to 20+ exercise modes to get real-time stats during your workouts—or let SmartTrackâ„¢ automatically recognize and record your exercises.
- Water resistant – You’re covered to 50m, so dance in the rain if that’s how you want to work out today.
- All-Day Activity Tracking – Track all-day activity like steps, distance, active minutes and calories burned to show how every part of your day gets you closer to your goals.
- Do Not Disturb Mode – Use do not disturb mode when you want to mute call, text, calendar and app notifications during the day.
- Voice Assistant – Quickly check the weather, set bedtime reminders and alarms, control your smart home devices and more—just by speaking to Google Assistant or Alexa Built-in on your wrist.◆◆
- Calls From Your Wrist – Use the built-in mic and speaker to take Bluetooth® calls hands-free, send callers to voicemail and adjust volume. Available when phone is nearby.◆◆
- Call, Text & App Notifications – Get notifications for calls, texts, calendar events and apps like Gmail and Facebook—plus send quick replies and voice replies right from your wrist. Available when phone is nearby. Replies on Android only.
- Spotify Connect & Control – Control Spotify from your wrist to stay motivated with curated playlists specifically made for your favorite workouts.***
- Fitbit Payâ„¢ – Load your credit and debit cards to your Wallet in the Fitbit app, then use your watch to tap and pay for purchases on the go—at transit stations, stores and more.
- Always-On Display Mode – See real-time exercise stats and check the time with just a glance—even when your hands are full. Turn the mode off to be more discreet. Always-on display mode requires more frequent charging.
- Apps on Your Wrist – Download hundreds of apps for fitness, sports and fun—everything from Uber to United Airlines to Spotify to TRX®.
- Find My Phone App – Can’t find your phone? Easily locate a misplaced phone right from your wrist by using the built-in Find My Phone app on your Fitbit smartwatch. Just tap to activate an alert and your phone will continuously ring and vibrate until you discover its location. Fitbit Mobile app must be running on your smartphone.
- Clock Faces – Choose from hundreds of clock face designs and store up to 5 of your favorites right on your wrist, then easily switch your look from classic to modern and back—or go for something totally unique with your own photo.
- 6+ Day Battery – A day lasts 24 hours. So should your watch. With 6+ day battery life, Fitbit Sense tracks your morning, night & everything in between without needing to stop for a charge. Varies with use and other factors; up to 12 hours with continuous GPS.
- Fast Charging – If you’re always on the move, fuel up with quick charging that gives your watch a full day’s charge in just 12 minutes.
- Biosensor Core – Skin temperature sensing, heart rate tracking and battery charging all take place inside this powerful, water-resistant hub on the back of Sense.
- Leading Edge Design – A polished stainless steel ring, custom AMOLED display, laser-bonded Corning® Gorilla® Glass 3 and innovative biosensor core make every piece of Sense exceptional by design.
- Infinity Band – The velvety soft new infinity band is lightweight, flexible and comfortable—seamless edges and a low profile are perfect for wearing all day and night.
- Accessories – Create endless looks with Fitbit Sense accessory bands, including Fitbit.com exclusive collections from Victor Glemaud and Pendleton. New quick-release feature makes it easier than ever to swap looks.
Sensors & Components
- Multi-path optical heart rate sensor
- Multipurpose electrical sensors compatible with ECG app & EDA app
- Red and infrared sensors for oxygen saturation (SpO2) monitoring
- Gyroscope
- Altimeter
- 3-axis accelerometer
- Skin temperature sensor
- Ambient light sensor
- Wi-Fi (802.11b/g/n 2.4GHz)
- NFC
- Built-in GPS + GLONASS
- Vibration motor
- Speaker (75dB SPL @10cm)
- Microphone
Battery & Power
Battery life up to 6+ days. Battery life and charge cycles vary with use, settings, and other factors; actual results will vary. Use of the always-on display and SpO2 features will require more frequent charging. We recommend charging every few days to ensure you’re always tracking.
- Battery type: Lithium-polymer
- Charge time: (10-80%): Approximately 40 minutes
- Fast charging: 1 day of battery life in 12 minutes
- Radio transceiver: Bluetooth®
Memory
- Saves 7 days of detailed motion data, minute by minute
- Saves daily totals for past 30 days
- Stores heart rate data at 1 second intervals during exercise tracking and at 5 second intervals all other times
Water Resistance
Water resistant to 50 meters. After getting the band wet, we recommend drying the band because, as with any wearable device, it’s best for your skin if the band is clean and dry.
Care
Give your wrist a rest by taking the band off every now and then. If the band gets wet or you sweat in it, remove and completely dry the band before putting it back on.
Materials
This watch includes a band made of a flexible material similar to that used in many sports watches, as well as an aluminum watch case and buckle.
Heart Rate
Like all heart rate tracking technologies, accuracy is affected by physiology, location of device and different movements.
Environmental Requirements
- Operating temperature: -10° to 45°C
- Maximum operating altitude: 8,535m
Compatibility
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 15 or higher.
- Android OS 9 or higher. See additional tips for Android phones
