In the bustling realm of innovative app development, an intriguing pair of fresh high school graduates, Zach Yadegari and Henry Langmack, are making waves with their creation, Cal AI. These 18-year-old tech prodigies, with their classic yet groundbreaking story, bring a refreshing twist to how we perceive at-home startups.
Cal AI emerged in May and, astonishingly, has surpassed 5 million downloads in just eight months. Yadegari reports a noteworthy customer retention rate exceeding 30%, accompanied by impressive revenue figures of over $2 million in the previous month. While some details remain unofficially verified, the app boasts a stellar 4.8-star rating on both the Apple App Store and Google Play, receiving tens of thousands of positive reviews.
The app offers a straightforward yet clever solution: snap a picture of your meal, and Cal AI logs the calories and macros seamlessly for you. While not the first to explore this space—MyFitnessPal and SnapCalorie are familiar names—Cal AI leverages the power of modern image models from leaders like Anthropic and OpenAI. By integrating open-source food databases, the app offers a 90% accuracy rate, a statistic that resonates with many health enthusiasts.
Interestingly, the journey wasn’t without its hurdles. The team tackled challenges like ingredient recognition from varied food presentations—a true testament to their technical prowess.
The story of Cal AI is intertwined with Yadegari’s passion for coding, which began long before AI copilots became the norm. His entrepreneurial spirit shone early when, as a ninth grader, he launched and sold his first business for a significant sum, all by creatively circumventing school web restrictions with a cleverly named game website.
These young entrepreneurs pushed boundaries further by immersing themselves in Silicon Valley’s dynamic environment, opting to reside in a hacker house in San Francisco to relentlessly refine their prototype. Despite this intense lifestyle, Yadegari learned a valuable lesson from his time among veteran tech enthusiasts: contrary to the stereotype, he decided that pursuing a college education was his next chapter.
Though he hasn’t settled on a university, Yadegari, alongside Langmack, continues to steer Cal AI towards success. The company, enriched by their growing team, including co-founder Jake Castillo as COO and other talented individuals, thrives on the synergy of creativity and ambition.
Cal AI stands as a testament to youthful innovation, with these teen visionaries poised to further shape the digital landscape while proving that age is just a number when it comes to breaking new ground.






