A new kind of topper providing thermal comfort during sleep - powered by Apple Watch. This sleeptech device is a topper providing superior thermal comfort in different zones. The topper is controlled by a watch app - no need for a smartphone near the bed. An algorithm determines changes to the Core-Body-Temperature (CBT) by reading the real-time heart rate recorded by the Apple Watch. CBT is an important factor how a person perceives warmth. Settings are modified by just using the Digital Crown of the Apple Watch. The topper automatically detects a person sleeping. Sleeptech can be so easy....