Version 1: Cal AI's 19-year-old founder just raised $10 million for an AI band

He sold his calorie app to MyFitnessPal. Now he is building Persona, an AI helper you can text or wear. Here is the simple story.

Picture this. You are 19. You and your school friend built a phone app. It made over $30 million in a year. A big company bought it. What would you do next?

Zach Yadegari started again. On October 8, 2026, TechCrunch reported that the 19-year-old has started a new company called Persona, and has already raised $10 million for it. Let us see how he got here, step by step.

First, what was Cal AI?

Cal AI is a calorie counting app. Calories are a way to measure the energy in food. A plate of rajma chawal and a bowl of salad have very different amounts.

Counting calories used to be boring. You had to type every item you ate. Cal AI made it simple: you just take a picture of your food, and the app guesses the calories for you.

A phone snaps a photo of a plate of food, a red line scans the photo, and a label says calories found. — Snap, scan, done. That was the whole idea.

Zach built it with his high school friend Henry Langmack. Both are 19 now. In under two years, the app crossed 15 million downloads and over $30 million in yearly revenue, according to MyFitnessPal. Revenue means all the money that customers paid.

A kid who started early

Zach started coding at age 7. He built a gaming website called Totally Science. During the COVID-19 pandemic, more than 5 million people used it.

TechCrunch says he built his first business in ninth grade and sold it for $100,000 when he was just 16. Think of it like a school kid's lemonade stall that grew so popular, someone bought the whole stall.

Here is a short CNBC Make It video about how he built Cal AI.

Watch on YouTube

The big sale

In March 2026, MyFitnessPal bought Cal AI. MyFitnessPal is an older and bigger calorie app. When one company buys another, it is called an acquisition.

The talks took almost a year. Nobody shared the price. The Cal AI team of seven people joined MyFitnessPal.

One small detail stands out. Because the founders were still students, Cal AI held its weekly team meeting on Sunday night. MyFitnessPal's boss, Mike Fisher, noticed things like this. "They're really serious about it," he told TechCrunch.

Rejected by 15 colleges

Here is a part that surprised many people. In 2025, Zach said he applied to 18 top colleges in America. He was rejected by 15, even with top marks and a running company. His post about it got over 22 million views on X.

He also shared the essay he wrote for his applications. Here is that post.

See the post on X

Three colleges did say yes. He chose the University of Miami.

Now: a helper you wear

Zach left MyFitnessPal in June. Then he went straight to his next idea: Persona.

Persona is a personal AI assistant. Think of it as a very smart helper that lives in your messages. You can ask it to order food, book a cab, take notes, plan travel, or answer emails.

Right now, it works as a free beta inside iMessage, Apple's texting app. A beta is a test version, like a practice match before the real tournament. It has "a few thousand beta users," Zach said.

And soon there will be a wristband. It costs $179 and is expected in December. It is not always listening. You press a button, or flick your wrist, to wake it up.

People can already pre-order it. Zach says the band has made "five figures in preorder revenue." Five figures means somewhere between $10,000 and $99,999.

Many apps, one helper

Zach has a big dream. He thinks all the apps on your phone will one day melt into one.

He told TechCrunch that everyday apps, like shopping apps, ride apps, food delivery apps and email, "will collapse into a single super app powered by an AI assistant."

App tiles for food, rides, email, travel and notes slide into one chat bubble that says one AI helper, one chat. — The idea: one chat that does the jobs of many apps.

A super app is one app that does many jobs. Like a Swiss army knife, but on your phone.

What about safety and money?

A helper that can buy things for you needs rules. Here is what Persona says:

The AI cannot see your card details.
Every purchase needs your OK first.
Your data is locked with a secret code (that is called encryption), and you can delete it.

So how will Persona make money? Through ads. When you ask it to find something to buy, some results may be paid ads. Zach says the AI will not know which items are ads, so it will still pick what fits you best.

Who gave the $10 million?

When investors give money to a young company, it is called a funding round. The investor who puts in the most and sets the deal is said to lead the round, like a team captain.

Persona's round was led by Vine Ventures. Cory Levy, the founder of Z Fellows, and Collective Global also joined in.

Want to see a day in his life?

Zach shares videos about his work on YouTube. Here is one.