Garmin Vivosmart 3Garmin Vivosport
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: 10.9 mm
MaterialSiliconeCase material: fiber-reinforced polymer
Lens material: chemically strengthened glass
ChargingUSBUSB
BatteryLithium batteryRechargeable lithium-ion
Battery lifeUp to 5 daysGPS mode: Up to 8 hours
Smartwatch mode: Up to 7 days
Water-resistanceUp to 50 metres (5 ATM)Swim
WeightSmall/medium: 20.4 g; Large: 21.5 gSmall/medium: 24.1 g
Large: 27.0 g
Sensor3 axis-accelerometer, barometric altimeter, heart rate monitor, vibration alert, ambient light sensorGPS, barometric altimeter, compass, accelerometer, heart rate
DisplayOLEDsunlight-visible, transflective memory-in-pixel (MIP), 72 x 144 pixels
Screen size9.6 mm x 19.2 mm, 64 x 128 pixels9.7 mm x 19.3 mm
ColorsBlack, PurpleSlate, Limelight, Fuchsia Focus
OtherMEMORY: 7 timed activities, 14 days of activity tracking data
Activity tracking 
StepsYesYes
DistanceYesYes
CaloriesYesYes
ActivityYesYes
FloorsYesYes
SleepYesYes
Heart rate24/7Yes
Vo2MaxYesYes
Stress & recoveryYesYes
UV exposure
Skin temperature
Galvanic skin response
GPSYes
Running featuresAccelerometer (calculates distance for indoor workouts, without need for a foot pod), personal records.Preloaded running profiles, GPS based distance/time/pace
Swimming features
Smartphone notificationsYesYes
Other - stress monitoring
- automatic rep count in the gym
- Clock, music control, auto goal, move bar
- all day stress tracking
- gym workout tracking
- music control, find my phone, etc.
- Built in apps for running, cycling, cardio, walking, strength training, rep counting, stair-stepper.
Links 
View onAmazon | GarminAmazon | Garmin
Amazon US rating3.3 out of 5 stars
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