June 17, 2026, 6:57 a.m. ET Sweat sliding down your forehead. Clamminess blanketing your hands. Butterflies fluttering in your stomach. Yes, we all know what stress feels like. But what if you could find out exactly just how stressed you were at any given moment? That's the premise behind AWEAR, once dubbed a "Fitbit for your brain," that uses EEG sensors to capture all the activity going on up there.