Phone Aid is an iPhone app that guides users through the CPR process.

A quick-thinking high school basketball coach and a $1.99 iPhone application called Phone Aid are being credited with saving the life of a Southern California teenager who collapsed during practice.

Xavier Jones stumbled, stopped, and went down the day before Thanksgiving at La Verne Lutheran High School, about 40 miles east of downtown Los Angeles.

The senior’s heart apparently had stopped and he wasn’t breathing, but head high school basketball coach Eric Cooper and assistant coach John Osorno administered cardiopulmonary resuscitation and were able to get him breathing again.

Cooper said that by chance, he had studied up on CPR the night before the incident, viewing instructions from Phone Aid, a first-aid application for the iPhone.

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“It was really fresh and clear in my brain,” Cooper told the Los Angeles Times for a story earlier this month. “We are trained in CPR, but the iPhone app was a stabilizer for us.”

“He saved his life,” the teen’s father, David Jones, told the San Gabriel Valley Tribune.

Jones told the Times he remembers nothing from the time he fell until he awoke from a medically induced coma 24 hours later.