An Apple Watch notification helped save a man’s life after it alerted him to needing immediate medical attention for a blood clot in his lungs.

James Green, a podcast producer and reporter, from Brooklyn, New York, tweeted: “Never thought a stupid lil wrist computer I bought two years ago would save my life.

“Saw my heart rate go up, ended up being a pulmonary embolism.”

The 28-year-old says he owes his life to the HeartWatch app, which monitors a person’s heart rate constantly throughout the day and notifies them when it goes above or below a certain threshold.

He told The Telegraph his doctor was glad he called, telling him that if he had waited any longer “it would have been fatal”.