Diesel On Full Guard vs. Fitbit Flex vs. Polar A370 vs. Fitbit Versa 2 vs. Amazfit T-Rex

 
On Full Guard
Flex
A370
Versa 2
T-Rex
 DieselOn Full GuardRemove Buy NowFitbitFlexRemove Buy NowPolarA370Remove Buy NowFitbitVersa 2Remove Buy NowAmazfitT-RexRemove Buy Now

Basic Info

Suggested Price$325$100$179.95$199$140
Release20172013201720192019

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration1 day5 daysUp to 3 days5 days20 days
Rechargeable

Compatibility

Android
iOS
Windows PhoneNA
Mac
Windows

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution454 x 454NA160 x 80300 x 300360 x 360
Size1.4 inchesNA1.18 inches1.34 inches1.3 inches
TouchNA
TypeOMOLEDLEDTFT LCDAMOLEDAMOLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water ResistanceIP671 ATMWR305 ATM5 ATM

Notifications

Phone
Emails
Texts

Software

Operating SystemAndroid Wear 2.0NABuild-inBuild-in
Apps
Music

All Wearables