Health you own.
Evidence you can use.

Labs, wearables, and the day you live — owned by you, not a device brand.

Keep your wearable. Keep your labs. Keep your freedom.

No new hardware · Never sold · Research is off until launched

The ambition

A voluntary map of human health, built by members.

A living picture of how people age, recover, train, and heal — wearables, labs, and the lived day — built by participants who choose to be here.

Membership is for your clarity. A research layer is not launched. If we ever run paid de-identified research, it will be optional.

Optimize your health. Advance science if you want. Never as someone else's product.

What we stand for

Holistic by design

Live. Train. Nutrition. Evidence. Experiment — five pillars, one spine.

No ecosystem trap

Bring Whoop, Oura, Apple Health, Garmin, labs — whatever you already trust.

Built with the community

Members shape the product. Research sharing is not launched.

Membership

One membership. Full access.

$399/year or $39/month. Cancel anytime.

$399/yr · $39/mo

30-day trial after you start using Kosei · Students 40% off annual

Join the community

FAQ

Quick answers.

What is Kosei? A community layer for optimizing your health — wearables, labs, and the lived day. Wellness and self-tracking, not a medical device.

Do I need to buy your hardware? No. Keep your stack. We have no desire to pull you into a commercial device ecosystem.

What does it cost? $399/year or $39/month. 30-day trial after data connect.

Do I have to share data for research? No. Research is not launched. Membership works without it.

Is this medical advice? No — wellness and self-tracking only.

Never sold. Sensitive fields encrypted. Research is off until launched. Principles · Privacy