Suunto Ambit3 Sport HR vs U8

Suunto Ambit3 Sport HR U8

Basic Info

Wear TypeWristbandWristband

Activity & Fitness

Activity Yes YesBoth track daily activity
Calories Yes YesBoth show estimated calories burned
Sleep Yes YesBoth track sleep pattern
Heart Rate / Pulse Yes NoSuunto Ambit3 Sport HR has the heart rate monitoring sensor
Distance Yes YesBoth track your running/walking distance
Steps Yes YesBoth track and count your steps
Pace Yes No
Speed Yes No
Stairs / Floors No YesU8 has built-in altimeter for elevation feature
Exercise Tagging Yes NoOnly Suunto Ambit3 Sport HR provides exercise tagging
Smart Coach No NoBoth don't have coaching feature
Goal Setting No NoBoth don't have goal setting
Inactivity Alert No YesU8 helps you stay active with inactivity alert

Additional Features

GPS Yes NoSuunto Ambit3 Sport HR has GPS support
Navigation Yes NoSuunto Ambit3 Sport HR has onboard GPS navigation
Compass Yes NoSuunto Ambit3 Sport HR has a compass
Watch / Clock Yes YesBoth have watch
Alarm Clock Yes YesBoth have alarm clock
Reminders No YesU8 has a reminder option
Stopwatch Yes YesBoth have stopwatch
Music Playback No NoBoth don't have music playback
Temperature No Yes
ReportsActivity, SleepActivity, Sleep

Smartphone Remote Features

Notifications Yes YesBoth show smartphone notifications
Caller ID Yes YesBoth show caller ID notification
Music Control No YesU8 allows control smartphone music player
Call Control No YesU8 allows you control phone calls
Camera Control No YesU8 has a smartphone's remote control function
Find Phone No NoBoth don't have a find phone feature


Duration14 days6 daysSuunto Ambit3 Sport HR battery life is about 2.3 times longer
Battery TypeRechargeable BatteryRechargeable Battery

Physical Specs

Weather Resistance Yes Yes
Waterproof No No
IP Rating5 ATMn/a
Weight80 grams44 gramsU8 is 36.0 g lighter

User Interface

Display YesLCD Screen
Display Sizen/a1,48 inches
Screen Resolution 128 x 128 pixels 128 x 128 pixels
Color Display No Yes
Touch Screen No Yes


Android Yes YesBoth compatible with Android devices
iOS Yes YesBoth compatible iOS devices
OS X/Mac Yes NoSuunto Ambit3 Sport HR compatibles with MacBooks and iMacs
Windows Phone No YesU8 compatibles with a range of Windows Phone devices
Windows Yes NoSuunto Ambit3 Sport HR allows you to locate your phone
Web Portal No NoBoth don't have online web portal option
Social Features No NoBoth don't have social features


Bluetooth Yes YesBoth have Bluetooth data transfer technology
Wi-Fi No NoBoth don't have Wi-Fi connection
NFC No NoBoth don't have NFC connectivity
ANT+ No NoBoth don't provide ANT+ wireless technology
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Suunto Ambit3 Sport HR