Two Teenagers Built ‘Cal AI’, a Photo Calorie App With Over a Million Users

An anonymous reader quotes a report from TechCrunch: In a world filled with “vibe coding,” Zach Yadegari, teen founder of Cal AI, stands in ironic, old-fashioned contrast.
Better still, he tells TechCrunch that the customer retention rate is over 30% and that the app generated over $2 million in revenue last month.