Apple has redefined what a watch can do. We talked to Apple’s top brains and other experts about the promises and perils of using wearables to optimize your health.

Macworld Apple unveiled the Apple Watch ten years ago last September, prompting the rumour mill to speculate about an anniversary watch—just like the iPhone X once was. The Apple Watch X was supposed to feature a new magnetic wristband system that could free up more space in the case for the battery and other modules.