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

Zach Yadegari, 19, has cofounded two apps and has launched a new productivity brand, Flow. Courtesy of Zach Yadegari Zach Yadegari, 19, cofounded Cal AI, an AI-powered nutrition and calorie-tracking app. MyFitnessPal acquired Cal AI in December 2025. Yadegari is already working on his next business venture, a new brand called Flow. While most college kids spent December cramming for finals, 19-year-old Zach Yadegari was selling his multimillion-dollar nutrition app. MyFitnessPal acquired Ca...