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All Fitbit Charge 4 vs. Fitbit Charge 6 vs. Fitbit One vs. Garmin Forerunner 955 vs. Garmin Vivosmart 3 vs. Nokia (Withings) Pulse Ox vs. Polar Loop 2
Fitbit Charge 4 Fitbit Charge 6 Fitbit One Garmin Forerunner 955 Garmin Vivosmart 3 Nokia (Withings) Pulse Ox Polar Loop 2

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Price and Release Date

Suggested Price$149$159$100$600$139.99$120$120
Release / Update2020202320122022201720142015

Activity & Fitness

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

Battery

Duration7 daysUp to 7 days10–14 days15 days5 days2 weeks8 days (without notifications)
Rechargeable

Compatibility Support

Android
iOS
Windows Phone
Macn/an/a
WindowsNot yetn/an/a

Connectivity Support

Bluetooth
Cellular
GPS
NFCFitbit Pay
Wi-Fi

Display

Colorblue
Resolution66x18260x26064 x 128128 x 32
Size.721 inches1.04-inch AMOLED1.3 inches
Touchswipe
TypeOLEDAMOLEDOLEDOLEDOLEDOLEDLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATMWater-resistant up to 50mSplash resistant5 ATM (50 Meters)5 ATM2 ATM

Notifications

Phone
Emails
Texts

Software

Operating SystemFitbit OSFitbit OSn/aBuilt-inn/an/a
Apps
MusicSpotify control

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