Garmin Fenix 8 v2
Xiaomi Mi Band 9 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 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

Activity Tracking: Steps, heart rate, active minutes, workout modes, sleep, body composition, calories tracking, stress, GPS. Alerts you to move if inactive.
Notifications: Displays calls and messages.
Water resistant: Yes

Age

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

14+ years

Battery

Up to 10 days

Up to 21 days

Brand

Garmin

Xiaomi

Continuous Glucose Monitoring (CGM) Compatible

Dexcom (G6 or G7)
Freestyle Libre 

No

FSA/HSA Eligible

Possibly with Letter of Medical Necessity (LMN)

Possibly with Letter of Medical Necessity (LMN)

Model

Fenix 8

Mi Band 9

Phone

Yes

Yes

Price (USD)

From $1,000.00

$60.00