Fitbit Alta vs. Fitbit Flex vs. Garmin Vivofit 4 vs. Amazfit T-Rex vs. Apple Series 6

 
Alta
Flex
Vivofit 4
T-Rex
Series 6
 FitbitAltaRemove Buy NowFitbitFlexRemove Buy NowGarminVivofit 4Remove Buy NowAmazfitT-RexRemove Buy NowAppleSeries 6Remove Buy Now

Basic Info

Suggested Price$130$100$79.95$140$399
Release20162013201820192020

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration5 days5 days1 year20 daysNot yet
Rechargeable

Compatibility

Android
iOS
Windows PhoneNA
Mac
Windows

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolutionn/aNA88 x 88360 x 360384 x 480
Sizen/aNANA1.3 inches40mm
Touchn/aNA
TypeOLEDLEDNAAMOLEDMicroLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor5 ATM
Water Resistancen/a1 ATM5 ATM5 ATM

Notifications

Phone
Emailsn/a
Texts

Software

Operating Systemn/aNABuild-inWatchOS 5
Apps
Music

All Wearables