Updated July 13, 2021 Recommendations are independently chosen by Reviewedâs editors. Purchases you make through our links may earn us a commission. Whether you already have a smart home or are just dipping your toes into automating your lights, entertainment, shopping lists, and so on, youâre probably aware of Googleâs position as a leader in the field. The tech giant released its first smart home device in 2016, and subsequent offerings include features that aim to give users more bang for their buck. Among the more noteworthy new features of Googleâs newest smart display, the Nest Hub Second Generation, is Sleep Sensing. When placed on your bedside table, the Hub claims to collect insights into your sleep patterns and habits through passive tracking (think: no chunky wearable you have to keep strapped to your wrist overnight). In fact, you donât have to activate it at night, or charge it like a Fitbit or Apple Watchâthe idea is that you just plug it in and let it do its thing.