Garmin Vivosmart 3Garmin Vivosmart HRGarmin Vivosmart HR+
Tech specs 
SizeWidth: 18.5 mm
Thickness: 9.8 mm
Length (small/medium): 197 mm
Length (large): 223 mm
Circumference (small/medium): 122-188 mm
Circumference (large): 148-215 mm
Width: 21.0 mm
Thickness: 12.3 mm
Width: 21.0 mm
Thickness: 15 mm
MaterialSiliconeSiliconeSilicone
ChargingUSBUSBUSB
BatteryLithium batteryLithium batteryLithium battery
Battery lifeUp to 5 daysUp to 5 daysUp to 5 days watch/activity tracking mode (24/7 heart rate monitoring, no GPS) or up to 8 hours using GPS
Water-resistanceUp to 50 metres (5 ATM)Up to 50 metres (5 ATM)Up to 50 metres (5 ATM)
WeightSmall/medium: 20.4 g; Large: 21.5 g29.6 g (1.0 oz), Regular; 32.0 g (1.1 oz), X-largeRegular: 31.0 g
Large: 33.0 g
Sensor3 axis-accelerometer, barometric altimeter, heart rate monitor, vibration alert, ambient light sensor3 axis-accelerometer, altimeter, heart rate monitor, vibration alert3 axis-accelerometer, altimeter, heart rate monitor, vibration alert, GPS
DisplayOLEDTouchscreen, 160 x 68 pixels, sunlight-visible, transflective memory-in-pixel (MIP)Touchscreen,160 x 68 pixels, sunlight-visible, transflective memory-in-pixel (MIP)
Screen size9.6 mm x 19.2 mm, 64 x 128 pixels1.00" x 0.42" (25.3 mm x 10.7 mm)25.3 mm x 10.7 mm
ColorsBlack, PurpleBlack, Imperial Purple, Midnight BlueBlack, Imperial Purple, Midnight Blue
OtherMEMORY: 7 timed activities, 14 days of activity tracking data
Activity tracking 
StepsYesYesYes
DistanceYesYesYes
Calories burnedYesYesYes
ActivityYesYesYes
FloorsYesYesYes
SleepYesYesYes
Heart rate24/724/724/7
Stress & recoveryYes
Pulse Ox
Respiration rate
UV exposure
Skin temperature
Galvanic skin response
Hydration level
Calorie intake
GPSYes
Running featuresAccelerometer (calculates distance for indoor workouts, without need for a foot pod), personal records.Accelerometer (calculates distance for indoor workouts, without need for a foot pod), personal records.Accelerometer (calculates distance for indoor workouts, without need for a foot pod), personal records, virtual pacer (compares current pace to target).
Swimming features
Other - stress monitoring
- automatic rep count in the gym
- Clock, music control, auto goal, move bar
Clock, music control, auto goal, move barClock, music control, auto goal, move bar
Non-fitness functions 
Smartphone notificationsYesYesYes
On-board music storage
Connected pay
LTE
Links 
Affiliate link*Amazon | GarminAmazon | GarminAmazon | Garmin
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