Compare Smartwatches and Fitness trackers.
  Apple Watch Series 3 Fitbit Flex 2 Apple Watch Series 4

Compare Apple Watch Series 3 vs Fitbit Flex 2 vs Apple Watch Series 4

  Smartwatch Fitness Tracker Smartwatch
Release / Update 2017 2016 2018
Suggested Price $279 $100 $399
 

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart
VO2max (Oxygen)
Sleep
Steps
Swim

Battery

Duration 18 hours 5 days 18 hours
Charging Wireless charging Rechargeable Wireless charging

Compatibility

Android
iOS
Windows Phone
Mac
Windows

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution 38mm: 340x272
42mm: 390x312
N/A 40mm: 324x394
44mm: 368x448
Size 1.5"
1.65"
N/A 759 sq mm display area
977 sq mm display area
Touch
Type AMOLED LED OLED Retina display with Force Touch, 1000 nits brightness

Functions

Audio Speaker
Clock
Phone
Vibration
Voice
Camera

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance 5ATM (50 metres) 5ATM (50 metres) 5ATM (50 metres)

Notifications

Phone
Emails
Texts

Software

Operating System watchOS 4.0, upgradable to 5.2.1 N/A watchOS 5.0, upgradable to 5.2.1
Apps
Music

More Info & Buy

Storage
16GB, 768 MB RAM
16GB
Extra
Colors: Space Black, Silver
Build: Stainless Steel/Ceramic back
3D Touch display
Bluetooth 4.2
Colors: Space Black, Silver, Gold
Build: Stainless Steel frame; all-ceramic/sapphire crystal back
Bluetooth 5.0;
Requires an iPhone 6 or later with iOS 12 or later;
Water resistance: Apple Watch 4 should not be used for scuba diving, waterskiing, or other activities involving high-velocity water or submersion below shallow depth.
Pros
Apple Watch Series 3 Pros
+ Adds barometer to GPS and swimproofing
Fitbit Flex 2 Pros
Apple Watch Series 4 Pros
+ Larger display
+ Lightweight design
Cons
Apple Watch Series 3 Cons
- Battery life takes a major hit when making calls or during GPS workouts
Fitbit Flex 2 Cons
Apple Watch Series 4 Cons
- No always-on display option
- Battery isn't amazing
- Still pricey
 
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