A free app for iPhone, by Bot Home Automation INC.

Ring is a video doorbell and smart home system that allows you to see who’s at your door, view live video from your security cameras, receive instant alerts, and speak with visitors through the built-in microphone.

If the alarm is triggered, Ring will send an alert to your phone and give you two ways to contact the authorities: through a simple call or a call to your preferred emergency hotline.

You can also make use of the app to control lighting or schedule them to turn on or off automatically, even when you’re not at home.