MacRumors published a review on the Apple Beddit 3.5 Sleep Monitor
A quote from the article:
Apple in 2017 purchased Beddit, a company that makes a sleep monitoring system designed to track your sleeping habits to help you improve your sleep hygiene.Apple Beddit 3.5 Sleep Monitor Review
Apple hasn't said much about the purchase, nor what it's doing with the data it collects from the Beddit system, but in December, Apple quietly pulled the original Beddit Sleep System and introduced a redesigned model with an updated and revised feature set.
There have been quite a few complaints about the new 3.5 version of the Beddit Sleep Monitor (and its accompanying app) because it removes some functionality that was available with the first model Apple offered. I've been using the original Beddit since 2017, so I decided to check out the new model to see how it compares.