The product appears functionally identical to its predecessor, able to record sleep duration, heart rate, breathing, snoring, and room conditions when slipped onto a mattress. Cosmetically though the product is more refined than its predecessor, hiding stitches and incorporating a dedicated opening for its USB cable.
Owners must also use a different iPhone app, Beddit (for Model 3.5), which requires iOS 12. The original Beddit app has been rebranded as "Beddit (for Model 3.0)," and needs only iOS 9.
The Beddit 3.5 syncs with HealthKit and will work with one or two people in a bed, though the second person can't be tracked unless they have their own monitor. Apple is selling the product for $149.95.
Apple bought Beddit in May 2017. The purpose wasn't known at the time, particularly since an Apple sleep expert, Dr. Roy J.E.M. Raymann, left shortly after the acquisition. Beddit shut down its legacy cloud services on Nov. 15 this year.
Earlier in 2018 Apple applied for a patent on technology extremely similar to Beddit's. In the future however the company could conceivably build sleep tracking into the Apple Watch, something so far supported via third-party apps.