An Apple Watch was used to alert the emergency services after a crash near Scorton yesterday.
The incident happened on the B1263 near Scorton at about 8.30am on Monday.
North Yorkshire Fire and Rescue Service (NYFRS) said the emergency services were called to the two-vehicle collision via an Apple Watch.
The devices have a crash detection system installed which detect if the user has been in a serious collision.
They will then provide a slider for the owner to call emergency services and share location details with the 999 operator.
Police, paramedics and firefighters from Richmond and Northallerton attended yesterday’s crash.
NYFRS said one person was medically trapped in one of the vehicles.
A spokesperson added: “Crews stood by whilst the male casualty was assisted from his car by ambulance crews before making the vehicles and scene safe.”
Firefighters also used the Whats3words location app to find the incident.