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
COROS vs Garmin
Both target athletes. COROS reads 15/27 signals and wins on weight, battery life, and price. Garmin reads 20/27 and wins on Body Battery, 24/7 stress, ECG, and a much larger app ecosystem.
COROS
15/27API signals exposed
Multisport watch
vs
GARMIN
20/27API 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, but the price and weight gaps are the bigger differentiators.
COVERAGE BY CATEGORY
Where each brand actually wins
Per-category breakdown of API signals.
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
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
- Garmin connects to MyBodyAI via GDPR upload; COROS is comparison-only for now
FAQ
Frequently asked questions
Should I choose COROS or Garmin?
For most people it is one or the other. Both are daily-wear devices that track the same core things, heart rate, sleep and activity, so wearing both is redundant. Use the matrix above to pick the one that wins the categories you care about.
Which one tracks more health signals?
COROS tracks 15 of the 27 signals I compare, Garmin tracks 20. The matrix above breaks it down by category, and they often win different categories.
Is it worth switching from COROS to Garmin?
Only if Garmin wins the categories you actually care about. If you already own COROS and it covers your main goal, the upgrade is rarely worth it. The matrix above shows exactly what changes.
How did you compare COROS 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.
WHERE TO BUY
Check prices at the source
Direct links to each vendor's store. No affiliate links.
- COROS Official store Check at COROS →
- GARMIN Official store Check at Garmin →
MORE COMPARISONS
Explore other pairs
OPTIONAL — IF YOU WANT MORE
Want one place that merges both feeds?
MyBodyAI merges these signals into Biological Age, Recovery and 9 other indices.
Start your 7-day trial →