This app knows when you’ve been in an accident — and then it calls 911 for you

Imagine you’re riding a bicycle when you collide with a car and are thrown over the handlebars.

When you hit the street, you’re knocked unconscious and unable to call for help. In this scenario, you’re wholly dependent upon a stranger coming to your rescue.

If you’re in public, surrounded by people, that might not be a problem. But if you’re injured when you’re alone, hours could pass before you’re found.

The makers of one app claim that their technology now includes a feature they refer to as “automatic crash detection and response.” As of last week, Noonlight — an app designed to connect people with rescue services — began using an algorithm that taps into a smartphone’s sensors, allowing the platform to measure and detect minuscule changes in the user’s location, motion and force.