The Apple Watch Series 12 is the start of a new wearable era

This time, heart rate monitoring is truly continuous. You wouldn't know that the Apple Watch Series 12 is a big deal just by looking at it. It has the same design, buttons, sizes, and sensor types as generations of Apple Watches before it.

But under the hood, the Series 12 builds in major changes that lay the groundwork for big ideas about the future of health and wearables.