The second-generation Google Nest Hub, which was released on November 9, will receive enhancements that will improve its sleep-sensing capabilities.
The Nest Hub will now display a Sleep Staging chart that shows information about your light, deep, rapid eye movement (REM) sleep, and awake periods throughout the night.

Sound detection on the Nest Hub is also being improved. It can record coughs and snores detected in your calibrated napping space instead of recording all the sounds in your room as you sleep.

In addition, in December, a new Nest Hub app called Calm will be introduced. The app includes sleep stories, relaxing music, and meditation sessions.

However, to use the whole library of tracks, you will need to purchase a Calm Premium account for roughly PHP 3,500 a year or a one-time payment of around PHP 25,000.
Furthermore, according to Google, the Sleep Sensing feature will be available as a free preview until 2022.

Watch how sleep sensing works on the second-gen Nest Hub from Google here:

Source: https://blog.google/products/google-nest/let-nest-help-you-rest-holidays/