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COROS vs Garmin

Both target athletes. COROS reads 15/27 signals through its partner API and wins on weight, battery life, and price. Garmin reads 19/27 and wins on Body Battery, 24/7 stress, ECG, and a much larger app ecosystem.

COROS 15/27API signals exposed Multisport watch · partner API

GARMIN 19/27API signals exposed Athletic / outdoor watch

QUICK VERDICT

If hardware weight and battery life dominate your decision, COROS is half the weight and lasts weeks. If you want every signal MyBodyAI can read from one device — Body Battery and 24/7 stress in particular — Garmin remains the standard. Garmin reads a handful more signals overall; the price gap and the weight gap are larger.

COVERAGE BY CATEGORY

Where each brand actually wins

Per-category breakdown of API signals.

Heart & Vitals

COROS 4/8

Garmin 6/8

Sleep

COROS 3/3

Garmin 3/3

Activity

COROS 5/6

Garmin 6/6

Fitness & Recovery

COROS 3/6

Garmin 4/6

Body Composition

COROS 0/4

Garmin 0/4

SIGNAL BY SIGNAL

The full matrix

Signal	COROS	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

COROS

Pick COROS if

Multi-week battery and light hardware matter
Price-to-spec ratio is your filter
Trail or ultra running and you already use COROS

GARMIN

Pick Garmin if

Body Battery + 24/7 stress + ECG matter
Larger ecosystem (Connect IQ, structured plans)
You're fine uploading a GDPR ZIP weekly until OAuth opens

COROS+GARMIN

Pick both if

COROS for ultras and trail expeditions
Garmin for daily wear and indoor training
Both feeds merge in MyBodyAI via partner API + GDPR upload

FAQ

Frequently asked questions

Can I connect both COROS and Garmin to MyBodyAI?

Yes. MyBodyAI merges signals from every connected source and uses richer-source-wins per field. COROS is built, waiting for vendor app approval, Garmin is live via GDPR upload.

Which one covers more MyBodyAI signals?

COROS reads 15 of 27 tracked signals. Garmin reads 19. 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 COROS to Garmin later?

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

WHERE TO BUY