Yes, many Apple Watch models can record a single-lead ECG in about 30 seconds.
If you are asking, “does Apple Watch have ECG,” the answer depends on your watch model, region, and software. This guide explains how the ECG app works, which models support it, how to take a reading, and what the results can and cannot tell you.
Does Apple Watch have ECG?
Yes, Apple Watch has an ECG feature on many newer models. The ECG app uses electrical sensors built into the back of the watch and the Digital Crown. When you touch the crown with a finger from your opposite hand, the watch creates a single-lead electrocardiogram.
An ECG, also called an electrocardiogram, records the electrical signals that control your heartbeat. Think of it as a short snapshot of your heart’s rhythm rather than a full medical exam.
The Apple Watch ECG app can look for signs of:
• Sinus rhythm, which usually means your heart rhythm looks regular
• Atrial fibrillation, often called AFib
• High or low heart rates that prevent a clear reading
• An inconclusive result
The ECG feature is useful, but it is not a replacement for a doctor, hospital ECG, or heart test. It can offer helpful information when symptoms occur, but it cannot detect every heart problem.
Which Apple Watch models have ECG?
The ECG app is available on selected Apple Watch models. In general, supported models include:
• Apple Watch Series 4
• Apple Watch Series 5
• Apple Watch Series 6
• Apple Watch Series 7
• Apple Watch Series 8
• Apple Watch Series 9
• Apple Watch Series 10
• Apple Watch Ultra
• Apple Watch Ultra 2
The Apple Watch SE models do not include the electrical sensors needed for the ECG app. The original Apple Watch, Series 1, Series 2, and Series 3 also do not support ECG recording.
A newer watch does not always mean better ECG results. The key factor is whether the model has the required electrical heart sensors and whether Apple has approved the ECG app in your country.
Does Apple Watch have ECG in every country?
No. ECG availability depends on local approval. Apple must receive permission from health regulators before enabling the feature in a region.
Your Apple Watch may have the correct hardware, but the ECG app might still be unavailable because of local rules. Availability can also change as Apple receives new approvals.
To check your watch:
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Open the Health app on your iPhone.
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Tap your profile picture.
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Select Health Details or Apps, depending on your iOS version.
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Look for the ECG app and heart health features.
You can also search for the ECG app directly on your Apple Watch. If you cannot find it, check your model, watchOS version, iPhone software, and country availability.
How does the Apple Watch ECG work?
The Apple Watch ECG uses two electrical contact points. One sensor sits on the back of the watch against your wrist. The second sensor is built into the Digital Crown.
During a reading, the electrical signal travels from your wrist, through your body, to the finger touching the crown. The watch measures the timing and pattern of your heartbeat for about 30 seconds.
To take an ECG reading:
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Wear the Apple Watch snugly on your wrist.
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Open the ECG app.
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Rest your arm on a table or in your lap.
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Place a finger from your opposite hand on the Digital Crown.
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Stay still and avoid talking.
