Open the Activity app on your Apple Watch. Swipe to the Sharing screen. Select the friend you want to challenge. Scroll down and tap “Compete.” Select “Invite [name]” and wait for them to accept the challenge. Open the Fitness app and select the Sharing tab (located at the bottom-right). Tap a friend.

The Apple Watch often makes headlines for saving lives by detecting signs of AFib, calling emergency services after a crash or fall, and other safety features. That wasn’t really the reason I bought one a few years ago.

Apple this week launched the Apple Health Study program, available in the Research app, to explore how technology can improve your health.

Apple has launched a wide-range health study, and those in the U.S. can use their iPhone, Apple Watch and even AirPods to get involved.