Here is a smart gadget that helps you avoid costly accidents in your home. The Roost Smart Water and Freeze Detector detects water leaks, humidity, and freezing temperatures. It connects to your smartphone to alert you when something is wrong. You can power the device for 3 years using replaceable AAA batteries.
The Roost app lets you invite trusted friends to look out for alerts when you are away. The device is expected to ship in February 2017.