nygazet.com logo

How I Cofounded a Million-Dollar App With a Teenager; Changed My Life

How I Cofounded a Million-Dollar App With a Teenager; Changed My Life
business10/3/2025

Jake Castillo cofounded an AI calorie tracking app with an intern he worked with last year. Now they are making $1 million a month in profit.

This as-told-to essay is based on a conversation with Jake Castillo, a 30-year-old cofounder at Cal AI, an AI-powered nutrition and food tracking app, based in California. Business Insider has verified the financial claims mentioned in this artical. ... [4817 chars]