Time Time Steel M400 Loop 2 Alta HR
  Pebble Time Remove Buy Now Pebble Time Steel Remove Buy Now Polar M400 Remove Buy Now Polar Loop 2 Remove Buy Now Fitbit Alta HR Remove Buy Now

Basic Info

Suggested Price $150 $250 $200 $120 $150
Release 2015 2015 2014 2015 2017

Activity & Fitness

Calories
Cycling (Bicycling)
Distance
Heart n/a n/a
Oxygen
Sleep
Steps
Swim

Battery

Duration 7 days 10 days 8 hours to 30 days 8 days (without notifications) 7 days
Rechargeable

Compatibility

Android
iOS
Windows Phone n/a n/a n/a n/a
Mac n/a n/a n/a
Windows n/a n/a n/a

Connectivity

Bluetooth
Cellular
GPS
NFC
Wi-Fi

Display

Color
Resolution 168 x 144 168 x 144 n/a n/a 128 x 36
Size 1.26 inches 1.26 inches n/a n/a 1.4 inches
Touch
Type e-paper e-paper n/a LED OLED

Functions

Audio Speaker Alerts only
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance 5 ATM 5 ATM 3 ATM 2 ATM

Notifications

Phone
Emails
Texts

Software

Operating System Pebble OS Pebble OS n/a n/a
Apps
Music

All Wearables