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Fitbit Ace 3 Fitbit Charge 4 Fitbit Flex Mobvoi TicWatch E Polar M400 Samsung Gear 2

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Price and Release Date

Suggested Price$130$149$100$159$200$300
Release / Update202120202013201720142014

Activity & Fitness

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

Battery

Duration8 Days7 days5 days1.5-2 Days8 hours2–3 days
Rechargeable

Compatibility Support

Android
iOS
Windows Phone
Macn/a
WindowsNot yetn/a

Connectivity Support

Bluetooth
Cellular
GPS
NFCFitbit Pay
Wi-Fi

Display

Color
Resolution240 x 24066x18n/a400 x 400128x128320 x 320
Size1.47 inches.721 inchesn/a1.4 inches1.63 inches
Touchn/a
TypePMOLEDOLEDLEDOLEDLCDSuper AMOLED

Functions

Audio SpeakerAlerts onlyBluetooth
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATM5 ATM1 ATMIP673 ATMIP67

Notifications

Phone
Emails
Texts

Software

Operating SystemBuilt-inFitbit OSn/aAndroid Wear 2.0Tizen OS
Apps
MusicSpotify control

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