Apple Watch series 5 44mm no ECG app.

you can't

if you are located in another country than the listed ones here or if you purchased the watch in a country not listed here

https://www.apple.com/watchos/feature-availability/#branded-ecg

then you can't use ECG by any means until both the country you are located in and the country you purchased it in

governments has approved ECG as it is viewed as medical equipment and is ilegal for apple to sell without approval

Thanks for asking about the new ECG feature.

Check here for availability in your region: ECG

ECG requires the following software:

- The iPhone must have iOS 12.1.1 or later installed

- The Apple Watch must have watchOS 5.1.2 or later installed

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 - 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