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Nokia (Withings) Pulse Ox vs. Pebble Time Round vs. Polar M400
Nokia (Withings)
Pulse Ox
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Pebble
Time Round
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Polar
M400
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Basic Info
Suggested Price
$120
$200
$200
Release
2014
2015
2014
Activity & Fitness
Calories
Cycling (Bicycling)
Distance
Heart
VO2max (Oxygen)
Sleep
Steps
Swim
Battery
Duration
2 weeks
2 days
8 hours
Rechargeable
Compatibility
Android
iOS
Windows Phone
Mac
n/a
n/a
Windows
n/a
n/a
Connectivity
Bluetooth
Cellular
GPS
NFC
Wi-Fi
Display
Color
blue
Resolution
128 x 32
128x128
Size
round
Touch
swipe
Type
OLED
e-paper
LCD
Functions
Audio Speaker
Alerts only
Clock
Phone
Vibration
Voice
Hardware
Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance
IPX7
3 ATM
Notifications
Phone
Emails
Texts
Software
Operating System
n/a
Pebble OS
Apps
Music
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