Garmin Vivosmart 5 v2
Garmin Fenix 8 v2

Device Details

Activity Features

Activity Tracking: Monitors steps, calories, distance, heart rate, sleep tracking, blood oxygen, stress tracking, GPS, energy levels, hydration, and women’s health. Tracks activities like walking, running, cycling, and cardio.
Notifications: Displays notifications from your phone. Receives both Dexcom and Libre smart push notifications where the glucose reading mirrors the smartphone device.
Water resistant: Yes

Activity Tracking: Monitors steps, calories, distance, heart rate, sleep tracking, blood oxygen, stress tracking, GPS, energy levels, hydration and women’s health. Tracks running, cycling, swimming, yoga, and more. Also has sports apps for workouts modes and guided exercises.
Performance metrics: Provides VO2 max, training effect, and recovery time.
Maps: Preloaded topographical maps for navigation.
Water resistant: Yes

Age

13+ years

13+ years or 22+ years for ECG app (only available in some regions)

Battery

Up to 7 days

Up to 10 days

Brand

Garmin

Garmin

Continuous Glucose Monitoring (CGM) Compatible

No

Dexcom (G6 or G7)
Freestyle Libre 

FSA/HSA Eligible

Possibly with Letter of Medical Necessity (LMN)

Possibly with Letter of Medical Necessity (LMN)

Model

vívosmart 5

Fenix 8

Phone

Yes

Yes

Price (USD)

$149.99

From $1,000.00