HelloWorld was an app done at YC Hacks with Ernestine Fu, Michael Carter, Max Goodman, David Li and Paul Tsui. It was a simple photo sharing app that let’s the user’s friends know when they’re nearby. The app was trending on the front page of TechCrunch the day it was released, and was subsequently covered in Stanford Daily, and Business Insider. It was acquired by Life360 in less than two months in a seven figure deal.