What happens when the app you started in high school goes viral? For Zach Yadegari, the answer was more than 15 million downloads, $30 million in annual revenue, and an acquisition by MyFitnessPal — all before his 20th birthday. Yadegari was just 17 when he co-founded Cal AI, the artificial intelligence (AI)-powered nutrition app that lets users track what they eat by snapping a photo. But those numbers leave out the part most founders would like to know: How did Cal AI get that kind of viral a…
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