<ul data-eligibleForWebStory="false"><li>Apple Watch Blood Oxygen app usage and ongoing ban complication in the US.</li><li>Explanation of ban impact, measuring SpO2 levels, and app support on models.</li><li>Details on ban affectation, features disabled, and potential reactivation possibilities.</li><li>Functionality overview, health benefits, device compatibility, and setup instructions provided.</li><li>Steps for taking and viewing SpO2 readings on Apple Watch with accuracy tips included.</li></ul>

How to use the Blood Oxygen app on Apple Watch—and why it’s banned in the US

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