Time Round Mi Band 2 Grayson Charge 3 Reign
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Basic Info

Suggested Price $200 $23 $350 $150 $150
Release 2015 2016 2018 2018 2015

Activity & Fitness

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

Battery

Duration 2 days 20 hours 24 hours 7 days 5 days
Rechargeable

Compatibility

Android
iOS
Windows Phone n/a NA
Mac n/a n/a NA
Windows n/a n/a Not yet NA

Connectivity

Bluetooth
Cellular
GPS
NFC NA
Wi-Fi

Display

Color
Resolution n/a n/a 453 x 454 66 x 18 NA
Size round 0.42 inches 1.39 inches .721 inches NA
Touch NA
Type e-paper OLED AMOLED OLED LED

Functions

Audio Speaker
Clock
Phone
Vibration
Voice

Hardware

Accelerometer
Barometer or Altimeter
Ultraviolet Sensor
Water Resistance IPX7 IP67 1 ATM 5 ATM NA

Notifications

Phone
Emails
Texts

Software

Operating System Pebble OS n/a Android Wear NA NA
Apps
Music

All Wearables