The Proof Floor
Live demos · no account · nothing saved

The Proof Floor

Most pitches ask you to believe. This one asks for 60 seconds. Below are three things The Human Brain App can do — and all three are running in your browser right now. Don't take my word for any of it.

MEASURE YOUR OWN MIND

The Stroop Test

A real cognitive test — the app measures YOUR reaction time in milliseconds, live. This is the same machinery behind the brain labs.

8 rounds. Tap the button matching the ink color, not the word. The classic Stroop effect: when the word fights the color, your brain pays a measurable cost in milliseconds.

REAL MATH, INSTANT RESULTS

Color Harmony Engine

Drag one slider, get four professionally-correct palettes. The exact wheel math that powers the public Color Theory Lab.

262°
Complementary
Analogous
Triadic
Split-Comp

Drag and every palette recomputes instantly — the same rotation math that powers the public Color Theory Lab. Computed in your browser, sent nowhere.

ASTRONOMY ON DEMAND

Any Night's Moon

Pick any date and see the moon that hung there — phase, illumination, age. Pure math, computed the moment you pick.

🌑

Phase

New Moon

Illuminated

0%

Moon age

29.1 d

Any date — a birthday, a night you remember — and the moon that hung there, computed from the standard synodic formula in your browser. Full moon in about 15 days.

That was three demos. The app has hundreds of pages.

Play the games

43 in-browser games. Several need no account at all.

EVERY GAME

Take the free tools

27 public pages, free forever, no login.

THE PUBLIC SHELF

Read the honesty rule

What's real, what's invented, what's decoration — on one page.

PLAIN ENGLISH

No Fibs — Honest Limitations

Every demo above is the app's real math running locally in your browser: the Stroop test is a genuine 8-round reaction-time measure (a study toy, not a clinical assessment), the color palettes are exact HSL rotation (not perceptual color science), and the moon is the standard synodic-month formula (accurate to about a day, not an ephemeris). Nothing you did on this page was saved or sent anywhere.

The Human Brain App · built by Steve