The way you wear your Apple Watch is actually incredibly important. Without a snug fit, features like heart rate sensing or activity tracking won’t work as intended. And while it’s pretty easy to just adjust your watch strap yourself, Apple’s working on a technology that could allow the strap to do that for you.
There are a couple of possible applications. For one, the so-called smart band could inform users whether they’re at the proper tightness level. From there, users could adjust the fit manually using an electronic system. But the more interesting use case is a strap that could automatically adjust itself if it detects that it’s been loosened.