Samsung Gear S2 vs. Fitbit Alta vs. Garmin 645 Music vs. Michael Kors Access Sofie HR vs. Amazfit GTR

 
Gear S2
Alta
645 Music
Access Sofie HR
GTR
 SamsungGear S2Remove Buy NowFitbitAltaRemove Buy NowGarmin645 MusicRemove Buy NowMichael KorsAccess Sofie HRRemove Buy NowAmazfitGTRRemove Buy Now

Basic Info

Suggested Price$300$130$450$395$199
Release20152016201820192019

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration2-3 days5 days7 days2 days24 days
Rechargeable

Compatibility

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

Connectivity

Bluetooth
Cellularn/a
GPSn/a
NFC
Wi-Fi

Display

Color
Resolution360 x 360n/a240 x 240390 x 390454 x 454
Size1.2 inchesn/a1.2 inches1.19 inches1.39 inches
Touchn/a
TypeSuper AMOLEDOLEDMIPOMOLEDAMOLED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water ResistanceIP68n/a5 ATM0.3 ATM5 ATM

Notifications

Phone
Emailsn/a
Texts

Software

Operating SystemTizenn/aWear OSBuild-in
Apps
Music

All Wearables