SHERMAN OAKS, Calif. (CNN) – A California teen is sharing her high-tech way to handle lunch-room anxiety.

Natalie Hampton, 16, struggled to make friends back in middle school. The hardest part of the day? Lunch time.

“I ate along pretty much every day for the two years that I was there. And I have personally felt the rejection, isolation and embarrassment that go along with that,” Hampton said.

So she launched an app called “Sit with Us” that lets students sign up to be lunch table ambassadors, offering other students a place to sit. Natalie says it’s been a huge success, with kids who would normally sit alone now eating with their classmates.

In less than a week, the app has been downloaded about 3,000 times.