MyFitnessPal Acquires Cal AI, the Viral Calorie App Built by Teenagers

MyFitnessPal has acquired Cal AI, the viral AI calorie-counting app built by two high school teenagers that racked up over 15 million downloads and $30 million in annual revenue in under two years. The deal, which closed in December, is a remarkable outcome for co-founders Zach Yadegari and Henry Langmack, who are now just 19 years old.

The Cal AI Story

Cal AI's premise is dead simple: take a photo of your food, and AI estimates the calories. No manual logging, no scanning barcodes, no searching databases. Just point, shoot, and eat. That simplicity drove explosive growth — the app went from zero to 15 million downloads and $30 million in annual revenue with a team of just seven employees.

Co-founder Zach Yadegari, who went viral on X after revealing that 15 of 18 top colleges rejected him despite having a 4.0 GPA and a successful company, continues to run Cal AI as a unit of MyFitnessPal while attending college.

Why MyFitnessPal Bought It

MyFitnessPal CEO Mike Fisher says he'd been tracking Cal AI since early last year through tools like Sensor Tower, where the two apps were neck-and-neck in their category rankings. The deal took nearly a year of on-and-off talks to close.

What convinced Fisher wasn't just the download numbers — it was the team's dedication. Cal AI's weekly standup meeting happened on Sunday nights because the founders were still in school. "This is someone who's not doing this as a hobby," Fisher said. "They're really serious about it."

What Changes for Users

Cal AI will remain an independent app with its same speed-first approach. The key upgrade: Cal AI now has access to MyFitnessPal's massive nutrition database spanning 20 million foods, 68,500 brands, and 380+ restaurant chains.

Fisher sees the two apps serving different markets: Cal AI is for people who want speed over accuracy, while MyFitnessPal is for those who want to fine-tune every detail right down to "three pickles, not two."

The Bottom Line

Two teenagers built a $30M revenue app in under two years, got acquired by the biggest name in calorie tracking, and are still running it while in college. Meanwhile, most venture-backed startups with $50M in funding and 200 employees would kill for those numbers. The Cal AI story is either the most inspiring founder tale of the year or a damning indictment of how overcomplicated most tech companies make things.