Fitbit Charge 3 vs. Fitbit Flex vs. Diesel On Full Guard 2.5 vs. Apple Watch 8 vs. Apple Watch Ultra

 
Charge 3
Flex
On Full Guard 2.5
Watch 8
Watch Ultra
 FitbitCharge 3Remove Buy NowFitbitFlexRemove Buy NowDieselOn Full Guard 2.5Remove Buy NowAppleWatch 8Remove Buy NowAppleWatch UltraRemove Buy Now

Basic Info

Suggested Price$150$100$325$499$799
Release20182013201820222022

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
Oxygen
Sleep
Steps
Swim

Battery

Duration7 days5 days4 days18 hrs36 hrs
Rechargeable

Compatibility

Android
iOS
Windows PhoneNA
Mac
WindowsNot yet

Connectivity

Bluetooth
Cellular
GPS
NFCNA
Wi-Fi

Display

Color
Resolution66 x 18NA454x454340 x 272 or 390 x 312502x410 pixels
Size.721 inchesNA1.39 inches1.5 inches or 1.65 inches1.92 inches
TouchNA
TypeOLEDLEDAMOLED

Functions

Audio Speaker
ClockLTPO OLED Retina
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance5 ATM1 ATM3 ATM5 ATM10 ATM (100 Meters)

Notifications

Phone
Emails
Texts

Software

Operating SystemNANAWear OSWatchOS 9WatchOS 9
Apps
Music

All Wearables