Fitbit Alta vs. Garmin Vivosmart HR vs. Garmin Forerunner 235 vs. Amazfit T-Rex vs. Apple Series 6

 
Alta
Vivosmart HR
Forerunner 235
T-Rex
Series 6
 FitbitAltaRemove Buy NowGarminVivosmart HRRemove Buy NowGarminForerunner 235Remove Buy NowAmazfitT-RexRemove Buy NowAppleSeries 6Remove Buy Now

Basic Info

Suggested Price$130$170$299.99$140$399
Release20162015201720192020

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration5 days5 days9 days20 daysNot yet
Rechargeable

Compatibility

Android
iOS
Windows Phonen/a
Macn/a
Windowsn/a

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolutionn/a160 x 68215 x 180360 x 360384 x 480
Sizen/a1.08 inches1.23 inches1.3 inches40mm
Touchn/a
TypeOLEDn/aMIPAMOLEDMicroLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor5 ATM
Water Resistancen/a5 ATM5 ATM5 ATM

Notifications

Phone
Emailsn/a
Texts

Software

Operating Systemn/an/aBuild-inWatchOS 5
Apps
Music

All Wearables