This Teenage Founder Sold His $40 Million Startup. Now, He’s On to the Next One

19-year-old serial entrepreneur Zach Yadegari is still chasing his dream of building a billion-dollar company.

This 19-year-old sold his $30 million AI calorie-tracking startup. Now he's tackling doomscrolling.

MyFitnessPal acquired Cal AI, an AI-powered calorie-tracking app that 19-year-old Zach Yadegari cofounded while he was in ...