While most college kids spent December cramming for finals, 19-year-old Zach Yadegari was selling his multimillion-dollar nutrition app. MyFitnessPal acquired Cal AI , an AI-powered calorie-tracking app that Yadegari cofounded while he was in high school, late last year. The app officially launched in May 2024, amassing 10 million users and $30 million in annual revenue. While there are many reasons to sell an app — money, partnerships, shifting consumer trends — Yadegari said honest