There are two kinds of founders: Those who start with a bold idea and learn the business skills along the way, and those who already have the business instincts and are simply hunting for the right idea. Zach Yadegari is the latter. He’s been building all kinds of apps for years, from websites that let students access blocked games during school to alarm clocks that play motivational soundbites. When he met Henry Langmac at coding camp at 10, and they joined forces, that pace only accelerated. “We were going to just keep releasing new apps until we found one that really stood out and felt like it had real potential,” Yadegari says. “Then we’d double down and go all-in.” That app was Cal AI, an AI-powered calorie tracker and a 2026 Under 30 company. This week, the cofounders announced they sold the app to MyFitnessPal after scaling it to $30 million in revenue last year. Read more about the sale of Cal AI—and its 19-year-old founder— here: 📸: Courtesy of Cal AI