Will ECG app work in USA

Thanks for asking about the ECG feature.

Check here for availability in your region: ECG

ECG requires the current non-beta version of iOS and watchOS. For additional help with the ECG feature on your Apple Watch, take a look at these articles.

Heart rate notifications on your Apple Watch - Apple Support

Taking an ECG with the ECG app on Apple Watch Series 4 or later - Apple Support

If you have any other questions, please reach out to our team here: https://apple.co/HeartFeatures. If you believe that you are experiencing a medical emergency, please dial your local emergency services.

Take care.

No. If you purchased a Watch in Australia and it does not support ECG, it will not support it outside of the country of purchase.

Not to my knowledge, since the device is not approved in Australia. Also, the warranty is not valid for a US watch in Australia either.

Hi @ECGprob!

The ECG function should work in the USA if you change you region/location for your Apple ID in the settings app on your iPhone