Apple Watch · irregular rhythm notifications
Irregular rhythm notifications missing? Check region and model first
Irregular rhythm notifications are available in more countries than ECG, but not everywhere. The feature requires watchOS 5 or later on Series 1 and newer models. If notifications are not showing up, the most common causes are: your region is not on Apple's support list, your age is below the threshold, or your device location is being read as outside a supported country.
Why are irregular rhythm notifications not working?
Irregular rhythm notifications check heart rhythm in the background and alert you if an irregular pattern is detected. Availability depends on Apple's regulatory clearance in each country, your Apple Watch model (Series 1 or later), and your age (22+ in most regions). Unlike ECG, this feature does not require an electrical heart sensor and is available on a broader set of devices.
How irregular rhythm notifications differ from ECG
The ECG app records a single-lead electrocardiogram on demand. Irregular rhythm notifications run passively in the background, checking your heart rhythm periodically and alerting you only if an irregular pattern suggestive of atrial fibrillation is detected over multiple checks.
Because these features use different sensors and different regulatory pathways, their country lists are not identical. One feature can be approved in a country while the other is still pending. Irregular rhythm notifications are typically available in more countries.
- ECG = on-demand, electrical heart sensor required
- Irregular rhythm = passive background check
- Different regulatory clearances per feature
- SE models support notifications but NOT ECG
What to check when notifications are missing
First, confirm your country is on Apple's official feature-availability list. Then verify your Apple Watch is Series 1 or later, your paired iPhone is up to date, and your age in the Health app meets the minimum (22 in most regions).
If all conditions are met, check whether your device location matches a supported country. Some users find that the Health app only surfaces the notification setup after their iPhone detects they are physically in a supported region.
- Country must be on Apple's availability list
- Apple Watch Series 1 or later required
- Age 22+ in most regions
- Device location may trigger Health app to show setup
Frequently asked questions
Can WLOC help verify irregular rhythm notification eligibility?
It depends on what is actually blocking you. If device location is the missing piece, set a test target in a supported country and reopen the Health app. WLOC does not change your Apple ID country or guarantee Apple's eligibility check will pass.
Which countries support irregular rhythm notifications?
Apple's watchOS feature-availability page lists all supported countries. The list includes the US, UK, Canada, most EU countries, Hong Kong, Japan, Australia, and others. Check the official page for updates.
Do irregular rhythm notifications require the same age as ECG?
Yes, the minimum age is 22 in most supported regions.
Sources
- Apple primary sourcewatchOS Feature AvailabilityOfficial list of supported countries for irregular rhythm notifications
- Apple supportIrregular rhythm notificationsHow the feature works, device requirements, and limitations