OURA Ring

The Oura Ring is the latest in sleep analytic technology. According to Oura, the finger is the most convenient place to measure your sleep and body signals day and night. To use, you simply place this stylish yet clever ring on your finger, and proceed with your usual sleeping routine. Overnight, the ring analyzes your heart rate, sleep motion and temperature using optics and then the app recommends ways to optimise your sleep for ultimate physical and mental performance.
The ring itself comes in two colors, is scratch and water proof and is non-allergenic.

Find it here at Kickstarter