Apple added a new gesture to the Apple Watch Series 9 and Apple Watch Ultra 2 that the company believes will change how you use your wearable. Double Tap lets you control various system functions by tapping your thumb and index finger together twice in quick succession -- no need to touch the display or free up your other hand. The company gave several examples of the feature in action. You can use Double Tap to answer or end calls, snooze alarms, play / pause music or start and stop timers. Apple COO Jeff Williams said it's especially useful for times when your other hand isn't free, like when walking a dog or carrying groceries.

It says the irregular rhythm detector isn't for people who've been diagnosed with atrial fibrillation. And both the EKG and heart rhythm function are "not intended to replace traditional methods of diagnosis or treatment." As The Washington Post has reported, some cardiologists worry people taking Watch EKGs could result in a flood of unnecessary office visits by healthy people. The heart sensors can let people with heart conditions or anxiety know when they might need to take it easy. Margery Widroe, 80, who's been using a Series 3 Apple Watch for a few months, recounted to our group a recent incident when she was at the grocery store and her Watch alerted her to a high heart rate.