While you don't need a watch or ring to tell you when you got a great night's rest, sleep technology can give you a more detailed glimpse at your sleep quality and how it changes over time.
By measuring variables like heart rate, movement, and body temperature, these tools estimate how much time is spent in deeper sleep stages like REM sleep and slow-wave sleep each night. They also give wearers a sense of how lifestyle changes (shifting dinnertimes, later workouts, etc.) improve or impair their sleep scores. As for one thing that's helping people level up on multiple aspects of their sleep? The data is in, and it's sleep support+.