
The Spark
The fire that lights first.
Quick to start, warm to be around.
- first to say yes
- runs warm
- hates waiting
Same dinner, same air-conditioning — one of you reaches for a blanket, one opens the window. Four bodies, four climates.
chejil (체질) — your constitution: the way your body tends to warm up, digest, rest and react.




Answer for how you are most of the time, not how you'd like to be. This one counts. The test picks up from question 2.

Same table, same food, same air-conditioning — and four bodies react four ways. Korean medicine has had a story about this for a long time, and this test, written by a Korean medicine doctor, tells you where you sit in it.
Not willpower, not mood — your body's default setting.
See which one I am — 1 minute →Where this comes from
A Korean medicine doctor keeps noticing that the same food and the same weather land differently on different people. He sorts people by how their bodies run — warming, digesting, resting, reacting — and names four constitutions in a book, the Donguisusebowon.

That idea is still the everyday language of Korean medicine — and of ordinary conversation in Korea. "What's your constitution?" is a normal question.
We kept the frame and added what the clinic reads alongside it — patterns, phases, balances — rewritten in plain words you can use on a Tuesday.
Four constitutions aren't the whole story
Even a desert gets rainy days. Your constitution is like the climate — not frozen, but slow to change, so the big pattern holds for a long time. Your balance is today's weather: running warm or cool, low on reserves or overloaded — and it can shift with the season, your sleep, and your stress, sometimes within weeks. The report reads both, and a retest in a month puts the two forecasts side by side.
So a Spark, who runs warm by constitution, can still read cool today. Weather changing isn't a fault — it's normal; constitution doesn't move that fast. A quiz that only reads climate misses this.
The slow side. The big pattern holds for a long time.
Moves in weeks — with the season, sleep, stress and what you've been eating.
Four different readings of the same answers — no panel decides another.
What's behind how this month feels?
Flow, reserves, fluids — the everyday tendencies behind your energy right now.
Which of the four am I?
The lead character. One of four constitutions — how you warm up, digest, rest and react. Slow to change.
Where is the load right now?
Five jobs your body does. The map shows which one is busiest this month. Read separately from your constitution.
Which way am I tilting today?
Warm or cool, depleted or replete, surface or deep, and the yin-yang headline on top.
Meet the four
The test decides, though — not the vibe. No constitution is better than another.

The fire that lights first.
Quick to start, warm to be around.

The wind that goes first.
Sees far, moves first.

A deep reservoir, a narrow channel.
Thinks deep, decides once.

A big ship — slow to leave, goes far.
Holds steady, lasts long.
Peek inside
A sample — The Anchor. Yours reads your answers.

“A big warehouse full of goods, with the heating off.” — A centered sum doesn’t mean the balance is ‘good’ — it means two axes tilt in opposite directions.
Score = load · the higher, the more it wants attention (same direction as the pattern % below)
Test time · free and paid
The test is free all the way through. You pay once, after you've seen your result, only if you want to unwrap the full report.
Fifteen questions about your body, not your birthday. You get an early lean toward one constitution.
The rest, in short chapters. Your constitution, one line on today's balance, and your share card — free.
Once you've seen the result: the full report. One check-in, or a pack to compare next month's weather.
Check-ins
Prices in USD. Packs include the first check-in. Retests open 20 days after the last one.
Compared
| ilomi | Typical free 4-type quiz | Personality type test | |
|---|---|---|---|
| Made by | A licensed Korean medicine doctor | Usually unattributed | Psychologists or enthusiasts |
| What it reads | 4 constitutions + 3 patterns, 5 phases, 8 balances | One of four labels | One of 16 (or so) types |
| Your body right now | Yes — today's balance, separately from your constitution | No | No |
| Daily guide | Eat · Move · Time, three changes a month | Rarely | Career and relationship tips |
| Retake in a month | The weather changes; the overlay shows it | Same answer | Same type |
One page, before you start
In Korea, the constitution questionnaire used in clinics is part of real care — longer, more sensitive, answered across the table from a practitioner.
ilomi starts from the same frame but with a different purpose: not to diagnose anything, but to see which way your body leans — and to answer questions like "why am I always cold?" in your body's own words.
| Clinic questionnaire | ilomi | |
|---|---|---|
| Used for | Clinical judgement | Getting to know your body |
| Questions | Deeper, more sensitive | Everyday words, light |
| How you answer | With a practitioner | On your own, about 10 min |
| What comes out | Diagnosis and treatment plan | Understanding + small daily adjustments |
So the report has no diagnosis and no prescription.
— ilomi · made by a licensed Korean medicine doctorNo — it's for self-reflection and wellness. It doesn't diagnose or treat anything.
The four constitutions are the face of it — the part people share. Underneath, the same answers are also read as 3 patterns, 5 phases and 8 balances, each on its own. That's the multi-dimensional part.
Chejil (체질) is the Korean word for constitution — the way your body tends to warm up, digest, rest and react. It's the lead character of this test; the other three readings are the weather around it.
Your constitution can change, but slowly, the way a climate does. Your balance moves with the season, sleep and stress, sometimes within weeks. The report reads the two separately so one doesn't get mistaken for the other.
No. It isn't an organ scan. It's the tradition's way of grouping everyday experiences — stress, digestion, sleep, recovery — into five jobs and showing where the load sits this month.
None. The story needs all four characters.
It's a lean, not a verdict — fifteen questions can only read constitution. The full test adds the other three readings and confirms it.
Yes. Your constitution should hold; your balance won't. A month later is the fun part — the report overlays the two.
15 questions, one minute. No email, no account for the free part.
Find my constitution — free