Best for ECG functionality
Polar Grit X2 Pro
4.0 feature score
Highest scored product for this feature based on supporting review evidence.
Best Polar Smart Watch for ECG functionality
ECG functionality Decision Dashboard
Safest pick
Polar Vantage M3
3.0 feature score
Balances feature score, supporting reviews, and overall product strength.
Most evidence
Polar Street X
2 supporting reviews
Has the broadest review evidence for this feature.
Best overall product
Polar Pacer Pro
3.7 overall score
Strongest overall product among items with scored evidence for this feature.
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ECG was viewed as useful for intentional HRV readings rather than full medical-grade detection.
Pros: recovery insights, build quality
Cons: contactless payments, onboard music storage
ECG is useful as a sensor feature, but reviewers note it lacks diagnostic Afib support.
Pros: brightness, display quality
Cons: call handling, voice assistant quality
ECG was also a limitation: reviewers framed the missing ECG sensor as understandable at the price but still a downside for users who prioritize health metrics.
Pros: workout tracking variety, flashlight usefulness
Cons: blood oxygen tracking, ECG functionality
ECG functionality was treated as a missing health feature compared with competing smartwatches.
Pros: workout tracking variety, activity auto-detection
Cons: onboard music storage, blood oxygen tracking