Fitbit Flex 2 vs. Amazfit Stratos vs. Apple Watch Series 4 vs. Amazfit T-Rex vs. HTC re Grip

 
Flex 2
Stratos
Watch Series 4
T-Rex
re Grip
 FitbitFlex 2Remove Buy NowAmazfitStratosRemove Buy NowAppleWatch Series 4Remove Buy NowAmazfitT-RexRemove Buy NowHTCre GripRemove Buy Now

Basic Info

Suggested Price$100$199$329$140$199
Release20162018201820192020

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration5 days5 daysNot Yet20 days5 hours to 2.5 days
Rechargeable

Compatibility

Android
iOS
Windows Phonen/aNA
MacNA
WindowsNA

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Colorn/a
Resolutionn/a320 x 300384 x 480360 x 360160 x 32
Sizen/a1.34 inches1.78 inches1.3 inches1.8 inches
Touchn/a
TypeLEDOLEDMicroLEDAMOLEDPMOLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATM5 ATMNot Yet5 ATMIP57

Notifications

Phone
Emails
Texts

Software

Operating Systemn/aProprietaryWatch OS 5Build-inNA
Apps
Music

All Wearables