In wearable tech, menstrual health often feels like an afterthought. Case in point: Fitbit, the first major wearable maker to add period tracking to its platform, did so in 2018 — over a decade after launching its first device. So is it any surprise that, in the era of smartphones and smartwatches, people are still using menstrual products that have remained largely unchanged over the last 90 years? Not really, but that might soon change. Emm, a smart menstrual cup, is currently going…