Fitbit Charge 6 v2
Whoop 4 v3.0

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, body battery, readiness for workouts Tracks running, cycling, swimming, yoga, and other multi-sport tracking. Also has sports apps for workouts modes and guided exercises. Allows creating and customizing workouts.
Performance metrics: Provides VO2 max, training effect, and recovery time.
Maps: Includes preloaded topographic maps.
Notifications Displays notifications from your phone.
Water resistant: Yes

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

Age

13+ years

13+ years

Battery

Up to 7 days

Up to 5 days

Brand

Fitbit

Whoop

Continuous Glucose Monitoring (CGM) Compatible

No

No

FSA/HSA Eligible

Possibly with Letter of Medical Necessity (LMN) or a health reimbursement arrangement (HRA)

Yes

Model

Charge 6

4.0

Phone

Yes

Yes

Price (USD)

$159.95

$239