Best for ECG functionality
Apple Watch Series 11
4.8 feature score
Highest scored product for this feature based on supporting review evidence.
Best Apple Smart Watch for ECG functionality
ECG functionality Decision Dashboard
Safest pick
Apple Watch Ultra 2
4.5 feature score
Balances feature score, supporting reviews, and overall product strength.
Most evidence
Apple Watch SE 3
24 supporting reviews
Has the broadest review evidence for this feature.
Best overall product
Apple Watch Series 10
4.1 overall score
Strongest overall product among items with scored evidence for this feature.
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The ECG feature receives strong support from a reviewer’s real family example where on-watch ECG readings caught an irregular rhythm missed elsewhere.
Pros: ECG functionality, app ecosystem
Cons: cross-platform compatibility, recovery insights
ECG was treated as part of Apple Watch’s serious health-safety suite, with reviewers connecting it to potentially life-saving monitoring.
Pros: app ecosystem, smartwatch features
Cons: cross-platform compatibility, blood oxygen tracking
ECG was treated as a mature health function that continued to work seamlessly rather than a major new upgrade.
Pros: reliability, comfort
Cons: calorie tracking usefulness, mapping and navigation
ECG was the most repeated missing health feature, often framed as the main reason some higher-risk buyers might step up to the Series line.
Pros: app ecosystem, operating system experience
Cons: cross-platform compatibility, ECG functionality