Fitbit Alta vs. Fitbit Flex 2 vs. Diesel On Full Guard 2.5 vs. Amazfit GTS vs. Amazfit T-Rex

 
Alta
Flex 2
On Full Guard 2.5
GTS
T-Rex
 FitbitAltaRemove Buy NowFitbitFlex 2Remove Buy NowDieselOn Full Guard 2.5Remove Buy NowAmazfitGTSRemove Buy NowAmazfitT-RexRemove Buy Now

Basic Info

Suggested Price$130$100$325$150$140
Release20162016201820192019

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration5 days5 days4 days14 days20 days
Rechargeable

Compatibility

Android
iOS
Windows Phonen/a
Mac
Windows

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Colorn/a
Resolutionn/an/a454x454348 x 442360 x 360
Sizen/an/a1.39 inches1.65 inches1.3 inches
Touchn/an/a
TypeOLEDLEDAMOLEDAMOLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistancen/a5 ATM3 ATM5 ATM5 ATM

Notifications

Phone
Emailsn/a
Texts

Software

Operating Systemn/an/aWear OSWear OSBuild-in
Apps
Music

All Wearables