Device safety
It is not a replacement for medical evaluation or continuous clinical monitoring. Notifications can be false or incomplete, some features are not intended for every user, and bands or sensors can irritate skin.
Apple Watch combines motion sensors and optical heart-rate sensing, with ECG and other regulated features on supported models and regions. Feature availability and accuracy vary by model, software and use context.
Purpose, evidence and practical considerations.
It is not a replacement for medical evaluation or continuous clinical monitoring. Notifications can be false or incomplete, some features are not intended for every user, and bands or sensors can irritate skin.