Compare ASUS ZenWatch 2 vs Fitbit Ionic vs Apple Watch Series 4
Smartwatch
Smartwatch
Smartwatch
Release / Update
2015
2017
2018
Suggested Price
$150
$299
$399
Activity & Fitness
Calories
Cycling (Bicycling)
Distance
Heart
VO2max (Oxygen)
Sleep
Steps
Swim
Battery
Duration
3 days
18 hours
Charging
Rechargeable
Rechargeable
Wireless charging
Compatibility
Android
iOS
Windows Phone
Mac
Windows
Connectivity
Bluetooth
Cellular
GPS
NFC
Wi-Fi
Display
Color
Resolution
320x320
348x250
40mm: 324x394 44mm: 368x448
Size
1.63" 1.45"
1.42"
759 sq mm display area 977 sq mm display area
Touch
Type
AMOLED
OLED
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
IP67 dust/water resistant (up to 1m for 30 mins)
5ATM (50 metres)
5ATM (50 metres)
Notifications
Phone
Emails
Texts
Software
Operating System
Android Wear 2
Fitbit OS
watchOS 5.0, upgradable to 5.2.1
Apps
Music
More Info & Buy
Storage
2.5GB
16GB
Extra
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.