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SmartwatchRadar

Best Smartwatches with ECG

Watches with an ECG app. Availability can vary by country and phone.

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87 smartwatches

Smartwatches with ECG

An ECG (electrocardiogram) app records your heart’s electrical signal in about 30 seconds, using a sensor you touch with your other hand. It can show signs of atrial fibrillation, a common irregular rhythm.

ECG availability depends on country, and on some brands also on your phone. Check the irregular rhythm alerts row too: those watch for problems in the background without you taking a reading.

Frequently asked questions

Does an ECG watch work with any phone?

Not always. Some brands only enable ECG with their own phones or in certain countries, so check before you buy.

What can a smartwatch ECG detect?

A single-lead watch ECG checks for signs of atrial fibrillation, a common irregular rhythm. It can't detect a heart attack or replace a full ECG at a clinic.

Does a watch ECG run all the time?

No. You start it yourself, usually by holding a finger on the crown or a button for about 30 seconds. Background rhythm alerts are a separate feature.