Every person is a whole world.
ManyWorlds turns the signals of everyday life into guidance for one person at a time. We're an independent studio in Seoul, and we make Grio.
An ordinary day
- 07:40 coffee, no breakfast again
- 12:30 gimbap at the desk
- 18:50 "I’ll start properly tomorrow"
- 23:20 the bowl of cereal you won’t log ← this is where we pay attention
The day most apps never see — no chart catches it. It's the one we build for.
Why we exist
Wearables can measure sleep, heart rate, and movement. Most products stop at the score. The harder work is connecting those signals to meals, routines, and the way you feel — then turning the pattern into a useful next step. We build that interpretation layer: personal, proactive, and on your side.
What we're making
Grio
Grio brings your sleep, HRV, activity, meals, and habits into one personal context. It notices patterns, explains what may be shaping today, and helps you choose what to do next — often before you ask.
How we work
One person, fully.
We'd rather understand one person deeply than reduce everyone to an average. Our software learns your baseline, routines, preferences, and off days — then works from there.
Action over dashboards.
A score is only useful if it changes what happens next. We connect the signals, explain the pattern, and make the next good choice easier to see.
Built to be trusted.
Health is about as personal as it gets. We're careful with your data, plain about what AI can and can't do, and we only ship things we'd hand to our own families.