NewNew(41 mm) Designed for performance with advanced fitness from Fitbit.(45 mm) Designed for performance in a larger size and display with advanced fitness from Fitbit.Personalized help for your health and fitness, safety, and productivity.Stay connected with the helpfulness of Google, and live healthier with Fitbit.,Get useful tools to manage your stress, sleep better, and gain healthier habits.Keep up with your fitness goals, and get insightful results from your workout routines.Supercharge your workouts.Do what you love and feel your best.Fitness and wellness goes fashion forward.ColorCase size and material41 mm roundAluminum case45 mm roundAluminum case41 mm roundAluminum case41 mm roundStainless steel case40.5 x 40.5 x 11.2 mmAluminum case40.5 x 40.5 x 11.2 mmAluminum case36.73 x 23.09 x 11.20 mmAluminum case39.32 x 18.6 x 11.75 mmPlastic case36.30 x 17.62 x 10.05 mmStainless steel caseDisplayActua display16% smaller bezelCustom AMOLED LTPO display with DCI-P3 colorUp to 2000 nits (peak brightness)Corning® Gorilla® Glass 5Actua display16% smaller bezelCustom AMOLED LTPO display with DCI-P3 colorUp to 2000 nits (peak brightness)Corning® Gorilla® Glass 5——Custom AMOLED display with DCI-P3 colorBrightness boost up to 1000 nitsCorning® Gorilla® Glass 5——Custom AMOLED display with DCI-P3 colorBrightness boost up to 1000 nitsCorning® Gorilla® Glass 5——AMOLED display—Corning® Gorilla® Glass 3——AMOLED display—Corning® Gorilla® Glass 3——AMOLED display—Corning® Gorilla® Glass 3——AMOLED display—Corning® Gorilla® Glass 3——AMOLED display—Corning® Gorilla® Glass 3Phone OS compatibilityAndroid 10.0 or newer—Android 10.0 or newer—Android 9.0 or newer—Android 9.0 or newer—Android 10.0 or neweriOS 14.0 or newerAndroid 10.0 or neweriOS 14.0 or newerAndroid 10.0 or neweriOS 14.0 or newerAndroid 10.0 or neweriOS 14.0 or newerAndroid 10.0 or neweriOS 14.0 or newerFitness trackingRun workout builderReal-time run guidanceDaily run recommendationsAdvanced run form tracking (in app)Run performance dashboard (in app)Cardio load,Target cardio load,Morning BriefAll-day activity trackingAuto Workout mode40+ exercise modesHeart Zone TrainingPace TrainingEnhanced workout viewsActive Zone MinutesDaily Readiness ScoreCardio Fitness ScoreHeart rate on exercise equipment,Workouts on your phoneStep TrackingCalorie TrackingGoals and RemindersFloors ClimbedSwimmingRun workout builderReal-time run guidanceDaily run recommendationsAdvanced run form tracking (in app)Run performance dashboard (in app)Cardio load,Target cardio load,Morning BriefAll-day activity trackingAuto Workout mode40+ exercise modesHeart Zone TrainingPace TrainingEnhanced workout viewsActive Zone MinutesDaily Readiness ScoreCardio Fitness ScoreHeart rate on exercise equipment,Workouts on your phoneStep TrackingCalorie TrackingGoals and RemindersFloors ClimbedSwimming————————All-day activity trackingAuto Workout mode40+ exercise modesHeart Zone TrainingPace TrainingEnhanced workout viewsActive Zone MinutesDaily Readiness ScoreCardio Fitness Score—Workouts on your phoneStep TrackingStep TrackingGoals and RemindersFloors ClimbedSwimming————————All-day activity trackingAuto Workout mode40+ exercise modes——Enhanced workout viewsActive Zone MinutesDaily Readiness ScoreCardio Fitness Score—Workouts on your phoneStep TrackingCalorie TrackingGoals and RemindersFloors ClimbedSwimming————————All-day activity trackingSmartTrack™ automatic exercise tracking (in mobile app only)40+ exercise modes———Active Zone MinutesDaily Readiness ScoreCardio Fitness Score—Workouts on your phoneStep TrackingCalorie TrackingGoals and RemindersFloors ClimbedSwim Laps————————All-day activity trackingSmartTrack™ automatic exercise tracking (in mobile app only)20 exercise modes———Active Zone MinutesDaily Readiness ScoreCardio Fitness Score—Workouts on your phoneStep TrackingCalorie TrackingGoals and Reminders—Swim Laps————————All-day activity trackingSmartTrack™ automatic exercise tracking (in mobile app only)40+ exercise modes———Active Zone MinutesDaily Readiness ScoreCardio Fitness ScoreHeart rate on exercise equipmentWorkouts on your phoneStep TrackingCalorie TrackingGoals and Reminders—Swim Laps————————All-day activity trackingSmartTrack™ automatic exercise tracking (in mobile app only)20 exercise modes———Active Zone MinutesDaily Readiness ScoreCardio Fitness Score—Workouts on your phoneStep TrackingCalorie TrackingGoals and Reminders—Swim Laps————————All-day activity trackingSmartTrack™ automatic exercise tracking (in mobile app only)20 exercise modes———Active Zone MinutesDaily Readiness ScoreCardio Fitness Score—Workouts on your phoneStep TrackingCalorie TrackingGoals and Reminders—Swim lapsHeart healthAdvanced heart rate trackingIrregular heart rhythm notificationsHigh and low heart rate notificationsECG app with AFib detectionAdvanced heart rate trackingIrregular heart rhythm notificationsHigh and low heart rate notificationsECG app with AFib detectionAdvanced heart rate trackingIrregular heart rhythm notificationsHigh and low heart rate notificationsECG app with AFib detectionContinuous heart rate monitoring—High and low heart rate notificationsECG app with AFib detectionContinuous heart rate monitoringIrregular heart rhythm notificationsHigh and low heart rate notificationsECG app for heart rhythm assessmentContinuous heart rate monitoringIrregular heart rhythm notificationsHigh and low heart rate notifications—Continuous heart rate monitoringIrregular heart rhythm notificationsHigh & low heart rate notificationsECG app for heart rhythm assessmentContinuous heart rate monitoringIrregular heart rhythm notificationsHigh & low heart rate notifications—Continuous heart rate monitoringIrregular heart rhythm notifications——Health metricsSkin temperature sensing,SpO2 nightly average, range, trends over timeHeart rate variabilityResting heart rateBreathing rateBlood glucose tracking (in app only)Menstrual health tracking (in app only)Skin temperature sensing,SpO2 nightly average, range, trends over timeHeart rate variabilityResting heart rateBreathing rateBlood glucose tracking (in app only)Menstrual health tracking (in app only)Skin temperature sensing,SpO2 nightly average, range, trends over timeHeart rate variabilityResting heart rateBreathing rateBlood glucose tracking (in app only)Menstrual health tracking (in app only)—SpO2 nightly average, range, trends over timeHeart rate variabilityResting heart rateBreathing rateBlood glucose tracking (in app only)Menstrual health tracking (in app only)Skin temperature sensorSpO2 (blood oxygen) trackingHeart rate variabilityResting heart rateBreathing rateBlood glucose tracking (in app only)Menstrual health tracking (in app only)Skin temperature variationSpO2 (blood oxygen) trackingHeart rate variabilityResting heart rateBreathing rateBlood glucose tracking (in app only)Menstrual health tracking (in app only)Skin temperature variationSpO2 (blood oxygen) trackingHeart rate variabilityResting heart rateBreathing rateBlood glucose tracking (in app only)Menstrual health tracking (in app only)Skin temperature variationSpO2 (blood oxygen) trackingHeart rate variabilityResting heart rateBreathing rateBlood glucose tracking (in app only)Menstrual health tracking (in app only)Skin temperature variationSpO2 (blood oxygen) trackingHeart rate variabilityResting heart rateBreathing rateBlood glucose tracking (in app only)Menstrual health tracking (in app only)Stress monitoringAll-day body response trackingStress notificationsStress Management ScoreStress management with EDA sensorsMood Logging and ReflectionsMindfulness content