Fitbit Charge - Activity and sleep tracking wristband
NapBot - NapBot is Machine Learning powered sleep tracker for your Apple Watch.
Apple Watch Series 3 - Apple's newest internet-connected smartwatch
Withings Sleep - A sleep tracking mat by Withings
Fitbit Blaze - Fitbit Blaze is a smartwatch that includes both a heart rate monitor and a fitness activity tracker. It comes with a color touchscreen, and you can change both the watch's strap and frame. Read more about Fitbit Blaze.
Rise: Track Sleep & Circadian - Wake up & fall asleep better