ECGExplore our articles about ECG. In-depth iPhone analysis, practical guides, and buying advice.Apple Watch Series 11 Sensors & ECG: Every Question Answered - Does the Series 11 have ECG? Blood oxygen in the US? How many sensors? Every Apple Watch Series 11 s...Apple Watch ECG: Accuracy & Doctor Insights - We analyzed the latest clinical research on Apple Watch ECG accuracy, including the 2026 EQUAL trial...Apple Watch ECG Accuracy: 2026 EQUAL Trial Results - The landmark 2026 EQUAL trial confirms that Apple Watch ECG increases AFib detection by 4x. Learn ab...