Safety Net is a tool to help keep you safe. You create a net of selected contacts along with a custom message. Then you set a timer and if you don't cancel the timer before it expires, your custom message is sent to your net along with your location.
Is the walk home or to your car dangerous? Set a timer! It should take at most 5 minutes for me to get to my car, so I set a timer for 5 minutes. If I get mugged, or are otherwise hurt and unable to phone for help, the timer expires and my friends are sent a Google maps link to my location. Help is on the way.