Apple's next-generation smartwatches could bring a major change to health tracking. With the company's September event less than two weeks away, Bloomberg’s Mark Gurman in his PowerOn newsletter says that the Apple Watch Series 12 and Apple Watch Ultra 4 may offer always-on heart rate monitoring, allowing users to get more continuous data about their health throughout the day.

Apple Watch Ultra 4 will be unveiled on September 9, here are the key ways it’s rumored to differentiate itself from prior models.

Alongside the new iPhones, the Apple special event on Sept. 9 will introduce two new Apple Watches, and these could include a major health feature enhancement.