Whoop 4 v3.0
Garmin Fenix 8 v2

Device Details

Activity Features

Activity Tracking: Recovery score, strain score, heart rate, active minutes, workout modes, calories, temperature, hydration, workouts. Alerts you to move if inactive.
Notifications: Displays calls and messages.
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 5 days

Up to 10 days

Brand

Whoop

Garmin

Continuous Glucose Monitoring (CGM) Compatible

No

Dexcom (G6 or G7)
Freestyle Libre 

FSA/HSA Eligible

Yes

Possibly with Letter of Medical Necessity (LMN)

Model

4.0

Fenix 8

Phone

Yes

Yes

Price (USD)

$239

From $1,000.00