Spire review: Keep calm and carry on with this beautiful breath-tracking device

Fitness trackers are a dime a dozen, but devices that focus on your mind instead of body are typically overlooked—mental health is incredibly personal and can be difficult to define, which makes it even harder to measure. That’s what makes Spire, a breath -tracking device that aims to curb stress, stand out. This device was released in 2014 but got a boost this summer with an Apple Store retail presence and an overhauled iOS app, so I decided to give the company-described “min