U.S. Markets closed

Apple's Next Big Breakthrough May Have Nothing to Do With the iPhone

Annie Gaus

The latest iPhone X's may have set hearts aflutter this week, but worry not—if they fluttered a little too far, the newest Apple Watch just might save their lives. At Apple's September 12 event, the latest in an annual extravaganza that draws hundreds of journalists from across the world to see Apple's latest products up close, it was the Apple Watch Series 4—not the iPhone XS, XS Max and XR that Apple unveiled—that truly stole the show. says that the Series 4 watch can detect heart abnormalities like atrial fibrillation, and you can use an app to take your own electrocardiogram (ECG/EKG).