App helps save teen trapped after car crash

Catrina Alexander, of North Carolina, used the Find My Friends app to locate her 17-year-old daughter who was pinned under her car after a crash.
2:32 | 06/17/19

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Transcript for App helps save teen trapped after car crash
We are back with a cell phone app that helped save a teen's life. A North Carolina mom using it could discover her daughter. Her daughter wasn't responding to her calls or text messages and knew something was wrong. That's when she searched for her using the find my friends app. My daughter is in a ditch in a ravine. Reporter: You're listening to a mother's frantic pleas desperate to get help for her daughter who was trapped under her car. Please send someone please. Reporter: Carrie Alexander says her 17-year-old daughter Macy had missed curfew when she couldn't get in touch with her. She tracked her down using the app find my friends. It turns out Macy's car had hydroplaned, flipped three times and landed 25 feet down a ravine, rescuers arrived on scene finding the teenager pinned under her car. I don't even know how I survived. Reporter: Macy says she was trapped for nearly seven hours. I was so relieved then when they came down to my car and held my hand I cried tears of joy. Reporter: Macy's mom turned to that popular app which allows you to share your gps location with select individuals. Katrina noticed her daughter's car was not moving so she raced to the scene calling 911 when she found her daughter. I can't explain watching this the gps on my phone, my dot getting close to hers and then suddenly seeing the tire tracks and that's all I could see. Reporter: Macy says she regularly uses find my friends with her mom and now wants other teens to do the same. I know it's hard for teenagers to give up your privacy but you like, you know, sneaking out and being places that you don't want your parents to know about is not worth being trapped under a car for seven hours. She said 28 cars passed by before her family came by. Her arm has significant nerve damage so that left harm pinned. She could move her right arm and the only thing she could reach was her bible. A lot of kids don't like their parents following them but she made that great point, this saved my life. Parents will say it's not about privacy. It's about safety. At the end of the day. Thank you, Paula. Coming up, I want you to

This transcript has been automatically generated and may not be 100% accurate.

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