Kello trains your sleeping habits without using sensors, Engadget

While there are already a handful of devices that claim to improve our sleep quality, one little startup from Hong Kong’s Brinc IoT accelerator thinks that it can do a better job. Kello is a sleep trainer that comes in the form of an internet radio alarm slash Bluetooth speaker slash home automation hub, and unlike some of the competition, it doesn’t use any bed sensor, clip-on device nor wearable to track the user’s sleep activity.