Zach Yadegari: How the Cal AI Founder Sold to MyFitnessPal at 19

Zach Yadegari, the Cal AI founder, is having the kind of year most entrepreneurs only dream about. At 19, the Long Island teenager has sold his AI calorie-counting app to MyFitnessPal, enrolled in college, and already launched his next venture — a physical alarm clock designed to fight the snooze button.

Yadegari’s story starts early. As a teenager on Long Island, he taught himself to code and sold his first project — a web gaming platform — for about $100,000 at just 16.

Instead of stopping there, he teamed up with his high school friend Henry Langmack to build something bigger. That something became Cal AI, one of the fastest-growing consumer AI apps of the past two years.

The pitch is disarmingly simple: photograph your food, and AI estimates the calories. Cal AI was built for speed and simplicity rather than lab-grade accuracy — and users loved it.

The numbers tell the story. The app racked up more than 15 million downloads in under two years and crossed $30 million in annual revenue, at times ranking neck-and-neck with MyFitnessPal itself on app-store charts. Not bad for a product built by two high schoolers.

In March 2026, MyFitnessPal announced it had acquired Cal AI — the deal had quietly closed back in December 2025. Terms were not disclosed, although industry estimates put the price in the nine figures.

Tellingly, MyFitnessPal CEO Mike Fisher noted the founders “didn’t have to sell.” With revenue like Cal AI’s, this was a deal made from strength, not necessity — the kind of exit most venture-backed startups never reach, achieved by a bootstrapped teenage team.

Here is the twist that made Yadegari internet-famous before the exit: despite a 4.0 GPA and a multimillion-dollar company, he was rejected by 15 of the 18 top colleges he applied to. His post about it went viral in 2025, igniting a debate about what elite admissions actually reward.

The punchline writes itself. A year later, the kid the Ivies passed on sold his company to one of the biggest names in health tech — while attending college anyway.

Cal AI is not being absorbed and shut down. The app stays independent, but it now plugs into MyFitnessPal’s nutrition database of more than 20 million foods, spanning 68,500 brands and over 380 restaurant chains — fixing the accuracy gap that was always its weak spot.

The seven-person team plus contractors moved over with the deal, and Yadegari continues to run Cal AI as a MyFitnessPal unit while studying. Yes — he is running an acquired company between lectures.

Yadegari is already onto venture number three. Released in March, Flow is a hardware-software combo built around a proprietary alarm clock: to silence the morning alarm, you must physically tap your phone against a dock placed somewhere in your home.

In addition, the companion app blocks access to chosen apps until the alarm is deactivated, and the system tracks sleep patterns. It is a deliberately physical answer to a digital problem — and a sign Yadegari is betting on health and productivity as his long-term lane.

Beyond the headlines, the Cal AI exit is a milestone for the “AI wrapper” generation. Critics dismissed simple apps built on top of AI models; Yadegari and Langmack turned one into 15 million downloads, $30 million in revenue and a nine-figure-estimate exit — without venture funding drama.

As a result, expect more teenagers to skip the internship track entirely. The playbook is public now: find a painful daily habit, wrap AI around it, distribute relentlessly on social media, and let the revenue do the talking.

AI is eating health and productivity from every angle. See our roundup of the best AI for mental health for the wellness side of the boom, or explore the top AI tools for small businesses if Yadegari’s playbook has you itching to build.

*Sources: TechCrunch, CBS New York, Inc., Inc. (profile), AOL / Business Insider.*