At just 18, Zach Yadegari built Cal AI, a health-tech app earning $1.4M monthly, blending AI, fitness, and wellness for global impact.
In the fast-moving world of artificial intelligence, age is no longer a barrier to success. Zach Yadegari, an 18-year-old freshman at the University of Miami, has already achieved what many seasoned entrepreneurs only dream of—building a profitable AI startup with $1.4 million in monthly revenue. His company, Cal AI, is disrupting the health and wellness industry with a smart, AI-powered calorie-tracking app that has taken the fitness world by storm.
Zach’s journey into technology started early. By the age of 7, he was experimenting with coding, and his fascination with artificial intelligence grew steadily through his teenage years. While most high school students focused on exams and extracurriculars, Zach was teaching himself advanced programming, building projects, and networking with innovators online.
That passion led him to co-found Cal AI in May 2024, just before starting college. Unlike traditional calorie-tracking apps, Cal AI uses machine learning algorithms to analyze eating habits, predict nutrition gaps, and provide personalized health recommendations in real time.
The health-tech market is saturated with apps that log meals, track workouts, and count calories. Cal AI stands out for its AI-first approach, offering:
This blend of personalization and automation has made Cal AI a favorite among fitness enthusiasts, professionals, and college students.
Launched in May 2024, Cal AI reached hundreds of thousands of users in less than a year. It runs on a freemium model:
With strong word-of-mouth and viral TikTok campaigns, Cal AI rose to the top of health & fitness app charts. As of September 2025, it generates $1.4 million in recurring monthly revenue, ranking among the fastest-growing health-tech startups globally.
Despite the success, Zach is still a full-time freshman. He manages by keeping a disciplined schedule:
“I wake up at 5 a.m., handle company tasks before classes, and use evenings for strategy sessions,” he said.
A strong team of engineers, nutritionists, and marketers, plus experienced advisors, allows Zach to focus on scaling and innovation.
Cal AI has already drawn interest from venture capital firms. While funding details are private, insiders suggest a Series A round could value the company in the hundreds of millions.
Future plans include:
With digital wellness projected to hit $400 billion by 2030, Cal AI is well-positioned to lead.
Zach’s rise showcases Gen Z entrepreneurs leveraging AI to build scalable businesses early. Unlike traditional startups, Cal AI became profitable in under a year, proving the potential of AI-driven consumer platforms.
But for Zach, it’s not just about revenue:
“I want to create tools that actually help people live healthier, longer lives. If Cal AI can improve daily habits for millions of people, then I’ll consider it a success.”
At just 18, Zach Yadegari is proving that passion, persistence, and smart use of technology can overcome barriers of age and experience. With Cal AI generating $1.4 million monthly and gearing up for global expansion, it’s on track to become a household name in digital health and wellness.
I am an entrepreneur, marketer, and mentor with a certification in entrepreneurship from IIT Delhi, one of the most prestigious institutions in India. I have a passion for connecting businesses with their ideal customers, solving real-world problems, and inspiring the next generation of founders.I founded and lead DevoByte, a digital marketing agency that provides a range of services, from SEO a
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