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All Amazfit T-Rex vs. Apple Watch 6 vs. Apple Watch Ultra vs. Fitbit Ace 3 vs. Fitbit Charge 5 vs. Fitbit Inspire 3 vs. Fitbit Sense 2 vs. Fossil Explorist vs. Fossil Hybrid Smartwatch vs. Fossil Q Machine vs. Polar M430
Amazfit T-Rex Apple Watch 6 Apple Watch Ultra Fitbit Ace 3 Fitbit Charge 5 Fitbit Inspire 3 Fitbit Sense 2 Fossil Explorist Fossil Hybrid Smartwatch Fossil Q Machine Polar M430

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Price and Release Date

Suggested Price$140$399$799$130$180$100$300$255$155$175$255
Release / Update20192020202220212021202220222018201920182017

Activity & Fitness

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

Battery

Duration20 daysNot yet36 hrs8 Days7 Days10 days6 days24 hoursMonths1 year30 hours
Rechargeable

Compatibility Support

Android
iOS
Windows Phone
Mac
WindowsYes

Connectivity Support

Bluetooth
CellularOptional
GPS
NFC
Wi-Fi

Display

Color
Resolution360 x 360384 x 480502×410 pixels240 x 24039,32x18,6336x336454 x 454390 x 390128x128
Size1.3 inches40mm1.92 inches1.47 inches1.04 inches1,46 inches1,59 inches1.4 inches1.19 inches1.4 inch
Touch
TypeAMOLEDMicroLEDLTPO OLED RetinaPMOLEDAMOLEDAMOLEDAMOLEDAMOLEDAMOLEDLCD

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATM5 ATM10 ATM (100 Meters)5 ATM5 ATM (50 Meters)5 ATM (50 Meters)5 ATM (50 Meters)IP675 ATMWR30

Notifications

Phone
Emails
Texts

Software

Operating SystemBuilt-inWatchOS 5WatchOS 9Built-inFitbit OSFitbit OSFitbit OSWear OS
Apps
Music

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