Updated 4/27/2022 10:10AM EST: 9to5Google has confirmed with Fitbit that the update that enables Irregular Heart Rhythm Notifications started rolling out on April 25th to eligible Fitbit devices in the U.S. However, for now the feature is limited to the United States and may take a few weeks to … [Read more...] about [Update: Rolling out now] Fitbit gets approval to use new AFib detection algorithm