The Spire is an activity monitor, designed by Stanford University's Calming Technology Lab, and is billed as a Fitbit for your mind. The device measures breathing patterns and counts your steps throughout the day to tell when you're tense or stressed and pinpoints what makes you focused. The unspoken claim is that Spire chills you out: "Customers report it reduces fatigue and headaches, increases calm and productivity and enables a healthier and more mindful day." Spire doesn't actually monitor your brain. It gauges your breathing. Slow, consistent breaths indicate calmness. Halting, uneven breaths signal tension. Breathing that's fast and consistent gets points for focus. Add lots of steps and Spire knows you're in an activity streak.