Our manifesto

We took the name ManyWorlds because every person is one — a whole world of days, habits, and small decisions nobody else can see from the inside.

Most health software ignores that. It counts your steps, grades your week, and leaves the actual living to you. We want to build the opposite: tools that pay attention to your particular world and help you take care of it.

We use AI for the parts that should feel handled — connecting the data, finding the pattern, remembering the context, and noticing when it is time to act. What's left is the human part: making one good decision in the life you are actually living.

We believe everyone should be able to understand their own health data and act on it, without needing a lab, an expensive hardware stack, or a human coach on call. Our first step is called Grio.

The team

Who builds ManyWorlds.

Heesu Jeong

Founder

Heesu started ManyWorlds in 2026 and builds Grio end to end — the iPhone app, the backend services, and the AI coaching system behind them.

Previously
Kinni · Chief Technology OfficermAy-I, Elice · Product Engineer
Education
Seoul National University · Electrical and Computer Engineering
LinkedIn profile
Founded
2026
Based in
Seoul, KR
First product
Grio
Stage
Released on iOS

Get in touch

We'd love to hear from you.

Press, partnerships, or just hello — the founder reads this inbox.