Fitbit Flex 2 vs. Apple Watch vs. Diesel On Full Guard vs. Diesel On Full Guard 2.5 vs. Amazfit T-Rex

 
Flex 2
Watch
On Full Guard
On Full Guard 2.5
T-Rex
 FitbitFlex 2Remove Buy NowAppleWatchRemove Buy NowDieselOn Full GuardRemove Buy NowDieselOn Full Guard 2.5Remove Buy NowAmazfitT-RexRemove Buy Now

Basic Info

Suggested Price$100$349$325$325$140
Release20162015201720182019

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration5 days18 hours1 day4 days20 days
Rechargeable

Compatibility

Android
iOS
Windows Phonen/aNA
MacNA
WindowsNA

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Colorn/a
Resolutionn/a340 x 272 or 390 x 312454 x 454454x454360 x 360
Sizen/a1.5 inches or 1.65 inches1.4 inches1.39 inches1.3 inches
Touchn/a
TypeLEDAMOLEDOMOLEDAMOLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATMIPX7IP673 ATM5 ATM

Notifications

Phone
Emails
Texts

Software

Operating Systemn/aWatch OSAndroid Wear 2.0Wear OSBuild-in
Apps
Music

All Wearables