Squish King Flan.
He is a block of caramel plasticine and he takes it personally. Knead him and the Flan Lab samples your hand ~60 times a second — pressure, speed, tremor and cadence — and turns it into one live Flan Stress Index you can share.
Squeeze him to start the 15-second test · let go at full force to demolish him
Open the stress lab
Same door as the other flan games: leave your email and the King is yours to knead. No card, no download.
One email, once. We use it to tell you when a new flan drops — and nothing else.
Read the small print: the FSI is a heuristic built only from how you move a pointer on this page. No camera, no microphone, no sensors, nothing leaves your browser. It is a toy score — not a medical device, not a diagnosis, not medical, psychological or health advice.
15 seconds of your hand, read back
Six things a 60 Hz stream of finger positions can actually tell you. They describe how you moved, not how you are.
Every number here comes from pointer coordinates and timestamps on this page. It is a description of a 15-second motor task in a browser game — not a tremor screening, not a diagnosis, not medical, psychological or health advice.
Refer a friend to this game
Send your link and the King greets them with your score to beat. When they open it, the lab knows you brought them.
The link only carries your name and your two numbers, plus your flan games invite code. Your invite code: ······
Capture
Every pointer or finger event is sampled at screen rate: position, drag distance from where you first pressed, and real pen pressure when your device reports it.
Model
Four channels come out of that stream — pressure, velocity, jerk and cadence — and a weighted mix produces the index. It rises fast under mashing and decays on its own when you ease off.
Report
The band and the verdict come from the index. The card is drawn in your browser so you can share the result without sharing your data — because there is no data to send.
Everything runs in your browser: no camera, no microphone, no sensors, nothing sent anywhere. It's a toy, not a diagnosis — not medical, psychological or health advice.