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All Amazfit T-Rex vs. Apple Apple Watch Ultra 2 vs. Apple Watch 3 vs. Apple Watch 6 vs. Fitbit Ace 3 vs. Fossil Explorist vs. Fossil Hybrid HR vs. Fossil Q Grant vs. Garmin Enduro vs. Garmin Forerunner 955 vs. Garmin Instinct vs. Garmin Instinct Solar vs. Motorola Moto 360 Sport vs. Polar Loop 2
Amazfit T-Rex Apple Apple Watch Ultra 2 Apple Watch 3 Apple Watch 6 Fitbit Ace 3 Fossil Explorist Fossil Hybrid HR Fossil Q Grant Garmin Enduro Garmin Forerunner 955 Garmin Instinct Garmin Instinct Solar Motorola Moto 360 Sport Polar Loop 2

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Price and Release Date

Suggested Price$140$799$199$399$130$255$215$175$799$600$300$400$299$120
Release / Update20192023201720202021201820192015202120222018202020162015

Activity & Fitness

Calories
Distance
HeartThird-generation optical heart sensor$
VO2max (Oxygen)
Sleep
Steps
Stress mgt
Female health
Skin temp
Breath rate

Battery

Duration20 daysUp to 36 hours normal use, Up to 72 hours in Low Power Mode18 hoursNot yet8 Days24 hours2 weeks7 days50 Days / Solar Charge15 days14 days24 days8 days (without notifications)
Rechargeable

Compatibility Support

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

Connectivity Support

Bluetooth
CellularOptional
GPS
NFC
Wi-Fi

Display

Colorn/a
Resolution360 x 360502 x 410 pixels340 x 272 or 390 x 312384 x 480240 x 240454 x 454Analogn/a280 x 280260x260128 x 128128 x 128
Size1.3 inches49mm1.5 inches or 1.65 inches40mm1.47 inches1.4 inchesNAn/a1.4 inches1.3 inches0.9 inches1.77 inches1.37 inches
Touchn/a
TypeAMOLEDAlways-On Retina LTPO OLEDAMOLEDMicroLEDPMOLEDAMOLEDE-INKn/aMIP LCDOLEDAMOLEDOLEDLCDLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATMWater resistance 100m, Dust resistance IP6X, EN13319 recreational scuba diving to 40m, Tested to MIL-STD 810H5 ATM5 ATM5 ATMIP673 ATM3 ATM10 ATM (100 Meters)5 ATM (50 Meters)10 ATM (100 Meters)10 ATM (100 Meters)2 ATM

Notifications

Phone
Emails
Texts

Software

Operating SystemBuilt-inWatchOS 10WatchOS 4WatchOS 5Built-inWear OSNAn/aBuilt-inBuilt-inWear OSAndroid Wear 2n/a
Apps
Music

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