> Unlike other sleep trackers that require you to physically wear something (such as the Apple Watch), Alarmo uses millimeter-wave presence sensors to track use

> Unlike other sleep trackers that require you to physically wear something (such as the Apple Watch), Alarmo uses millimeter-wave presence sensors to track user movement, and it feeds that data into an internal system that keeps track of user sleep patterns (Alarmo does not send any sleep information to Nintendo). Those mmWave devices are good for all kinds of projects and they're only a couple of bucks.