Heart rate
YesAltimeter
YesGPS
Uses smartphone GPSClock
YesWaterproofing
Water-resistantWaterproof
-Sleep tracking
-Companion app platforms
-Battery Life
-Silent alarm
-Notifications
-Display
-RAM
-Processor
-Battery
-Display Resolution
-Screen resolution
-Auto update
-Operating System
-Weight
-Conectivity
-ROM
-Weight
-Dimensions
-OS
-Storage
-Battery type
-Sensors
-Built-in Microphone
-Max brightness
-Comm
-Charging time (0-100%)
-Water resistance
-Heart rate
Chest strap compatibleAltimeter
YesGPS
YesClock
YesWaterproofing
-Waterproof
YesSleep tracking
-Companion app platforms
-Battery Life
-Silent alarm
-Notifications
-Display
-RAM
-Processor
-Battery
-Display Resolution
-Screen resolution
-Auto update
-Operating System
-Weight
-Conectivity
-ROM
-Weight
-Dimensions
-OS
-Storage
-Battery type
-Sensors
-Built-in Microphone
-Max brightness
-Comm
-Charging time (0-100%)
-Water resistance
-Heart rate
YesAltimeter
YesGPS
Uses smartphone GPSClock
YesWaterproofing
-Waterproof
NoSleep tracking
YesCompanion app platforms
iOS, AndroidBattery Life
4 daysSilent alarm
YesNotifications
-Display
-RAM
-Processor
-Battery
-Display Resolution
-Screen resolution
-Auto update
-Operating System
-Weight
-Conectivity
-ROM
-Weight
-Dimensions
-OS
-Storage
-Battery type
-Sensors
-Built-in Microphone
-Max brightness
-Comm
-Charging time (0-100%)
-Water resistance
-Heart rate
NoAltimeter
NoGPS
NoClock
-Waterproofing
YesWaterproof
-Sleep tracking
-Companion app platforms
-Battery Life
-Silent alarm
-Notifications
Call, TextDisplay
-RAM
-Processor
-Battery
-Display Resolution
-Screen resolution
-Auto update
-Operating System
-Weight
-Conectivity
-ROM
-Weight
-Dimensions
-OS
-Storage
-Battery type
-Sensors
-Built-in Microphone
-Max brightness
-Comm
-Charging time (0-100%)
-Water resistance
-Heart rate
NoAltimeter
NoGPS
NoClock
YesWaterproofing
Water resistantWaterproof
-Sleep tracking
YesCompanion app platforms
Android, iOS, WindowsBattery Life
-Silent alarm
-Notifications
-Display
-RAM
-Processor
-Battery
-Display Resolution
-Screen resolution
-Auto update
-Operating System
-Weight
-Conectivity
-ROM
-Weight
-Dimensions
-OS
-Storage
-Battery type
-Sensors
-Built-in Microphone
-Max brightness
-Comm
-Charging time (0-100%)
-Water resistance
-Heart rate
-Altimeter
-GPS
-Clock
-Waterproofing
-Waterproof
-Sleep tracking
-Companion app platforms
-Battery Life
-Silent alarm
-Notifications
-Display
-RAM
-Processor
-Battery
-Display Resolution
-Screen resolution
-Auto update
-Operating System
-Weight
-Conectivity
-ROM
-Weight
-Dimensions
-OS
-Storage
-Battery type
-Sensors
-Built-in Microphone
-Max brightness
-Comm
-Charging time (0-100%)
-Water resistance
-Heart rate
YesAltimeter
-GPS
YesClock
-Waterproofing
-Waterproof
Waterproof (50m)Sleep tracking
YesCompanion app platforms
-Battery Life
-Silent alarm
-Notifications
-Display
-RAM
-Processor
-Battery
-Display Resolution
-Screen resolution
-Auto update
-Operating System
-Weight
-Conectivity
-ROM
-Weight
-Dimensions
-OS
-Storage
-Battery type
-Sensors
-Built-in Microphone
-Max brightness
-Comm
-Charging time (0-100%)
-Water resistance
-Heart rate
NoAltimeter
YesGPS
NoClock
YesWaterproofing
-Waterproof
NoSleep tracking
NoCompanion app platforms
-Battery Life
6 monthsSilent alarm
NoNotifications
-Display
-RAM
-Processor
-Battery
-Display Resolution
-Screen resolution
-Auto update
-Operating System
-Weight
-Conectivity
-ROM
-Weight
-Dimensions
-OS
-Storage
-Battery type
-Sensors
-Built-in Microphone
-Max brightness
-Comm
-Charging time (0-100%)
-Water resistance
-Heart rate
YesAltimeter
YesGPS
-Clock
YesWaterproofing
Splash-resistantWaterproof
-Sleep tracking
Yes Companion app platforms
-Battery Life
-Silent alarm
-Notifications
-Display
-RAM
-Processor
-Battery
-Display Resolution
-Screen resolution
-Auto update
-Operating System
-Weight
-Conectivity
-ROM
-Weight
-Dimensions
-OS
-Storage
-Battery type
-Sensors
-Built-in Microphone
-Max brightness
-Comm
-Charging time (0-100%)
-Water resistance
-Heart rate
NoAltimeter
YesGPS
Uses smartphone GPSClock
NoWaterproofing
Fabric yes, after removing sensorsWaterproof
-Sleep tracking
-Companion app platforms
iOS, Android, Windows Phone, webBattery Life
-Silent alarm
-Notifications
-Display
-RAM
-Processor
-Battery
-Display Resolution
-Screen resolution
-Auto update
-Operating System
-Weight
-Conectivity
-ROM
-Weight
-Dimensions
-OS
-Storage
-Battery type
-Sensors
-Built-in Microphone
-Max brightness
-Comm
-Charging time (0-100%)
-Water resistance
-Heart rate
NoAltimeter
NoGPS
NoClock
YesWaterproofing
-Waterproof
Water-resistant (50m)Sleep tracking
YesCompanion app platforms
-Battery Life
-Silent alarm
-Notifications
-Display
-RAM
-Processor
-Battery
-Display Resolution
-Screen resolution
-Auto update
-Operating System
-Weight
-Conectivity
-ROM
-Weight
-Dimensions
-OS
-Storage
-Battery type
-Sensors
-Built-in Microphone
-Max brightness
-Comm
-Charging time (0-100%)
-Water resistance
-Heart rate
NoAltimeter
NoGPS
NoClock
NoWaterproofing
Splash-resistantWaterproof
-Sleep tracking
YesCompanion app platforms
iOS, Android, WindowsBattery Life
-Silent alarm
-Notifications
-Display
-RAM
-Processor
-Battery
-Display Resolution
-Screen resolution
-Auto update
-Operating System
-Weight
-Conectivity
-ROM
-Weight
-Dimensions
-OS
-Storage
-Battery type
-Sensors
-Built-in Microphone
-Max brightness
-Comm
-Charging time (0-100%)
-Water resistance
-Heart rate
YesAltimeter
YesGPS
YesClock
YesWaterproofing
-Waterproof
Water-resistantSleep tracking
-Companion app platforms
Android, iOSBattery Life
-Silent alarm
-Notifications
-Display
1.5" Curved Super AMOLEDRAM
512 MBProcessor
Dual-core 1.0 GHz Exynos 3250Battery
200 mAh Li-ion Typical usage time: 3 to 4 days, Standby time: Up to 5 daysDisplay Resolution
1.5" Curved Super AMOLEDScreen resolution
322 pixelsAuto update
English German, Japanese, Portuguese, Spanish, French and ItalianOperating System
Tizen for WearablesWeight
3.84 ouncesConectivity
WIFI (802.11 b/g/n) and Bluetooth (Bluetooth® 4.1)ROM
4 GBWeight
-Dimensions
-OS
-Storage
-Battery type
-Sensors
-Built-in Microphone
-Max brightness
-Comm
-Charging time (0-100%)
-Water resistance
-Heart rate
-Altimeter
NoGPS
NoClock
YesWaterproofing
-Waterproof
Water-resistant to 150ftSleep tracking
YesCompanion app platforms
iOS, AndroidBattery Life
-Silent alarm
-Notifications
-Display
-RAM
-Processor
-Battery
-Display Resolution
-Screen resolution
-Auto update
-Operating System
-Weight
-Conectivity
-ROM
-Weight
-Dimensions
-OS
-Storage
-Battery type
-Sensors
-Built-in Microphone
-Max brightness
-Comm
-Charging time (0-100%)
-Water resistance
-Heart rate
-Altimeter
-GPS
-Clock
-Waterproofing
-Waterproof
-Sleep tracking
-Companion app platforms
-Battery Life
-Silent alarm
-Notifications
-Display
-RAM
-Processor
-Battery
-Display Resolution
-Screen resolution
-Auto update
-Operating System
-Weight
-Conectivity
-ROM
-Weight
-Dimensions
-OS
-Storage
-Battery type
-Sensors
-Built-in Microphone
-Max brightness
-Comm
-Charging time (0-100%)
-Water resistance
-Heart rate
YesAltimeter
NoGPS
-Clock
-Waterproofing
164 ft. or 50 m.Waterproof
-Sleep tracking
-Companion app platforms
-Battery Life
5 daysSilent alarm
-Notifications
-Display
-RAM
-Processor
-Battery
-Display Resolution
-Screen resolution
-Auto update
-Operating System
-Weight
-Conectivity
-ROM
-Weight
-Dimensions
-OS
-Storage
-Battery type
-Sensors
-Built-in Microphone
-Max brightness
-Comm
-Charging time (0-100%)
-Water resistance
-Heart rate
-Altimeter
-GPS
-Clock
-Waterproofing
-Waterproof
-Sleep tracking
-Companion app platforms
-Battery Life
-Silent alarm
-Notifications
-Display
-RAM
-Processor
-Battery
-Display Resolution
-Screen resolution
-Auto update
-Operating System
-Weight
-Conectivity
-ROM
-Weight
-Dimensions
-OS
-Storage
-Battery type
-Sensors
-Built-in Microphone
-Max brightness
-Comm
-Charging time (0-100%)
-Water resistance
-Heart rate
YesAltimeter
YesGPS
YesClock
YesWaterproofing
-Waterproof
NoSleep tracking
YesCompanion app platforms
iOS, Android, WindowsBattery Life
7 daysSilent alarm
YesNotifications
-Display
-RAM
-Processor
-Battery
-Display Resolution
-Screen resolution
-Auto update
-Operating System
-Weight
-Conectivity
-ROM
-Weight
-Dimensions
-OS
-Storage
-Battery type
-Sensors
-Built-in Microphone
-Max brightness
-Comm
-Charging time (0-100%)
-Water resistance
-Heart rate
-Altimeter
-GPS
Connected (via smartphone)Clock
-Waterproofing
-Waterproof
-Sleep tracking
-Companion app platforms
-Battery Life
3-6 daysSilent alarm
-Notifications
-Display
1.34" 300x300 LCDRAM
-Processor
-Battery
-Display Resolution
-Screen resolution
-Auto update
-Operating System
-Weight
-Conectivity
-ROM
-Weight
1.34 oz (38 g)Dimensions
1.55 x 1.55 x 0.44 in (39.35 x 39.35 x 11.24 mm)OS
Fitbit OSStorage
4 GB internal (2.5GB for music)Battery type
Lithium-polymerSensors
3-axis accelerometer, 3-axis gyroscope, Optical heart rate monitor, Altimeter, Ambient light sensor, Vibration motor, WiFi antenna (802.11 b/g/n), SpO2 sensor, NFC (in special editions)Built-in Microphone
NoMax brightness
1000 nitComm
Wi-Fi (802.11 b/g/n), Bluetooth 4.0Charging time (0-100%)
2 hrsWater resistance
Yes, 165 ft (50m)Heart rate
-Altimeter
-GPS
-Clock
-Waterproofing
-Waterproof
-Sleep tracking
-Companion app platforms
-Battery Life
-Silent alarm
-Notifications
-Display
-RAM
-Processor
-Battery
-Display Resolution
-Screen resolution
-Auto update
-Operating System
-Weight
-Conectivity
-ROM
-Weight
-Dimensions
-OS
-Storage
-Battery type
-Sensors
-Built-in Microphone
-Max brightness
-Comm
-Charging time (0-100%)
-Water resistance
-Heart rate
No (but works with 3rd party trackers)Altimeter
NoGPS
NoClock
-Waterproofing
-Waterproof
Yes (3 meters)Sleep tracking
-Companion app platforms
-Battery Life
-Silent alarm
-Notifications
-Display
-RAM
-Processor
-Battery
-Display Resolution
-Screen resolution
-Auto update
-Operating System
-Weight
-Conectivity
-ROM
-Weight
-Dimensions
-OS
-Storage
-Battery type
-Sensors
-Built-in Microphone
-Max brightness
-Comm
-Charging time (0-100%)
-Water resistance
-