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Withings vs Garmin

Withings is medical-grade body composition, blood pressure, sleep apnea, AFib. Garmin is athletic 24/7 — Body Battery, stress, HRV, training load. They share the everyday heart, sleep and activity baseline, but each owns a different specialty — Withings the body, Garmin the training day.

withings 20/27API signals exposed Scale, BP monitor, watch

GARMIN 20/27API signals exposed Athletic / outdoor watch

QUICK VERDICT

Withings and Garmin are the most complementary live pair in MyBodyAI. Withings owns the body (weight, body fat, muscle, water, BP, temperature, AFib, sleep apnea). Garmin owns the day (Body Battery, stress, sleep, HRV, activities). Combined they cover 26 of 27 tracked signals. They share the everyday heart, sleep and activity baseline, but each owns a different specialty — Withings the body, Garmin the training day.

COVERAGE BY CATEGORY

Where each brand actually wins

Per-category breakdown of API signals.

Heart & Vitals

Withings 8/8

Garmin 6/8

Sleep

Withings 3/3

Garmin 3/3

Activity

Withings 5/6

Garmin 6/6

Fitness & Recovery

Withings 0/6

Garmin 5/6

Body Composition

Withings 4/4

Garmin 0/4

SIGNAL BY SIGNAL

The full matrix

Signal	Withings	Garmin
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

withings

Pick Withings if

Long-term body composition tracking
Blood pressure or sleep apnea screening
You prefer scale + BP monitor over a watch

GARMIN

Pick Garmin if

You want 24/7 wrist data
Body Battery and stress matter
GPS workouts and floors climbed matter

withings+GARMIN

Pick both if

Garmin watch 24/7 for the active signals
Withings scale + BP monitor for body and clinical
Best complementary live pair: 26/27 unique signals

FAQ

Frequently asked questions

Can I use Withings and Garmin together?

Yes, and they complement each other. Withings measures what a watch cannot on its own, body composition from a smart scale, blood pressure, and on some models an ECG. Many people keep Garmin for daily tracking and add a Withings device for the rest.

Which one tracks more health signals?

Withings tracks 20 of the 27 signals I compare, Garmin tracks 20. The matrix above breaks it down by category, and they often win different categories.

Which one should I get first?

Start with whichever covers your main goal. For daily heart rate, sleep and workouts, go with Garmin. For weight, body composition and blood pressure, go with Withings. You can add the other later.

How did you compare Withings and Garmin?

From each brand's official spec sheets and support pages, cross-checked against independent reviews like DC Rainmaker and The Quantified Scientist and peer-reviewed accuracy studies. Signal-level edge cases are noted in the matrix, not hidden behind a single check mark.

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