Home · Compare · WHOOP vs Fitbit

WHOOP vs Fitbit

WHOOP is a subscription strap focused on strain and recovery — 14/27 signals, no display. Fitbit is a daily-wear watch reading 17/27 including ECG, AFib, VO2max, plus weight via the Aria scale.

WHOOP 14/27API signals exposed Screenless strap

fitbit 17/27API signals exposed Daily-wear watch + scale

QUICK VERDICT

WHOOP and Fitbit serve different users. WHOOP is for athletes who already train by strain and recovery numbers. Fitbit is for everyone else — a watch with screen, ECG, AFib screening, sleep stages, plus a scale ecosystem. Fitbit reads more signals; WHOOP focuses fewer through a model built specifically for training load.

COVERAGE BY CATEGORY

Where each brand actually wins

Per-category breakdown of API signals.

Heart & Vitals

WHOOP 5/8

Fitbit 6/8

Sleep

WHOOP 3/3

Fitbit 2/3

Activity

WHOOP 3/6

Fitbit 6/6

Fitness & Recovery

WHOOP 2/6

Fitbit 1/6

Body Composition

WHOOP 1/4

Fitbit 2/4

SIGNAL BY SIGNAL

The full matrix

Signal	WHOOP	Fitbit
Heart & Vitals
Resting HR	✓	✓
HRV	✓	✓
SpO2	✓	✓
Respiratory Rate	✓	✓
Skin Temperature	✓	✓
Body Temperature	—	—
Blood Pressure	—	—
ECG · AFib	—	✓
Sleep
Sleep duration	✓	✓
Sleep stages	✓	✓
Sleep score	✓	—
Activity
Steps	—	✓
Active minutes	—	✓
Calories	✓	✓
Activities	✓	✓
Floors climbed	—	✓
Distance	✓	✓
Fitness & Recovery
VO2max	—	✓
Training load	✓	—
Recovery / Readiness	✓	—
Body Battery	—	—
Stress (continuous)	—	—
Cardiovascular age	—	—
Body Composition
Weight	✓	✓
Body fat %	—	✓
Muscle mass	—	—
Hydration	—	—

Verified against vendor developer documentation.

WHICH ONE FOR YOU

Pick the one that matches your priority

WHOOP

Pick WHOOP if

Strain and recovery are your daily metrics
No display matters to you
Monthly subscription is acceptable

fitbit

Pick Fitbit if

You want a watch on your wrist 24/7
ECG + AFib + VO2max from one device
Body fat via Aria scale matters

WHOOP+fitbit

Pick both if

WHOOP on upper arm + Fitbit on wrist
WHOOP for strain, Fitbit for ECG + daily signals
Merged feed: 20/27 unique signals total

FAQ

Frequently asked questions

Can I connect both WHOOP and Fitbit to MyBodyAI?

Yes. MyBodyAI merges signals from every connected source and uses richer-source-wins per field. WHOOP is built, waiting for vendor app approval, Fitbit is live via OAuth.

Which one covers more MyBodyAI signals?

WHOOP reads 14 of 27 tracked signals. Fitbit reads 17. The matrix above breaks the count down by category — they often win different categories.

Do the affiliate links change which device you recommend?

No. Recommendations on this page come from signal coverage and developer-API capability. Affiliate commissions never change the matrix, the pick-X-if cards, or your MyBodyAI subscription price.

What happens if I switch from WHOOP to Fitbit later?

Your MyBodyAI history is preserved per signal. New data starts arriving from Fitbit the moment you connect it. Disconnecting WHOOP pauses the old feed without deleting past data.

WHERE TO BUY