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Fitbit Alta HR Garmin 645 Music Garmin Fenix 3 Garmin Garmin Forerunner 965 Garmin Vivosmart HR Samsung Gear S2

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Price and Release Date

Suggested Price$150$450$500$749$170$300
Release / Update201720182015202320152015

Activity & Fitness

Calories
Distance
Heart$
VO2max (Oxygen)
Sleep
Steps
Stress mgt
Female health
Skin temp
Breath rate

Battery

Duration7 days7 days50 hours to 6 weeksUp to 12 days in smartwatch mode, Up to 32 hours in GPS mode, Up to 20 hours in GPS mode with music5 days2–3 days
Rechargeable

Compatibility Support

Android
iOS
Windows Phone
Macn/an/an/a
Windowsn/an/an/a

Connectivity Support

Bluetooth
Cellular$
GPS
NFC
Wi-Fi

Display

Color
Resolution128 x 36240 x 240218 x 218465 x 465 pixels160 x 68360 x 360
Size1.4 inches1.2 inches1.2 inches1.4 inches1.0" x .42"1.2 inches
Touch
TypeOLEDMIPChroma LEDSunlight-visible, transflective memory-in-pixel (MIP)LEDSuper AMOLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATM10 ATM (100 Meters)10 ATM (100 meters)5 ATMIP68

Notifications

Phone
Emails
Texts

Software

Operating SystemBuilt-inGarmin Watch OSn/aTizen OS
Apps
Music

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