The 'Atrial Fibrillation History' function integrated into Apple's Apple Watch has successfully secured Class II import medical device certification from the National Medical Products Administration. The officially registered name for this function is 'Mobile Pulse Rate Atrial Fibrillation Sign Recording Software,' and it was granted formal approval on December 26, 2025.

This particular function is tailored for patients who are 22 years old or above and have already been diagnosed with atrial fibrillation. Its primary purpose is to retrospectively estimate the proportion of time during which possible atrial fibrillation episodes may have occurred. It's important to note that this function does not issue individual alerts for atrial fibrillation signs, nor can it serve as a substitute for traditional diagnostic, treatment, or monitoring approaches.

The function operates by scrutinizing pulse rate data to identify potential signs of atrial fibrillation. It then tracks and estimates the overall burden of atrial fibrillation, generates trend graphs for better visualization, and also incorporates lifestyle data for a more comprehensive overview. To utilize this function, users must pair it with a compatible Apple Watch and the 'Health' app installed on an iPhone. By following a series of specific steps, users can access and view the relevant data within the 'Health' app on their iPhone.