Fitbit Flex 2 vs. Casio G-Shock GBA800 vs. Fitbit Alta HR vs. Jaybird Reign vs. Amazfit GTR

 
Flex 2
G-Shock GBA800
Alta HR
Reign
GTR
 FitbitFlex 2Remove Buy NowCasioG-Shock GBA800Remove Buy NowFitbitAlta HRRemove Buy NowJaybirdReignRemove Buy NowAmazfitGTRRemove Buy Now

Basic Info

Suggested Price$100$120$150$150$199
Release20162018201720152019

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration5 days2 years7 days5 days24 days
Rechargeable

Compatibility

Android
iOS
Windows Phonen/aNA
MacNA
WindowsNA

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Colorn/a
Resolutionn/a128 x 36NA454 x 454
Sizen/a1.4 inchesNA1.39 inches
Touchn/aNA
TypeLEDOLEDLEDAMOLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATM20 ATMNA5 ATM

Notifications

Phone
Emails
Texts

Software

Operating Systemn/aNABuild-in
Apps
Music

All Wearables