About reaction.8scoops.com
A free, in-browser racing reaction timer built for sim racers and real drivers who want to sharpen their launch-start reactions. Practise the lights-out moment for Formula 1, karting, MotoGP, NHRA drag racing, Le Mans / endurance, WRC rally, and any other motorsport that starts on a light cue.
Why it exists
The site was built for my son — a karting fan. As a baby, he'd get angry every time we made up the prescribed seven scoops of formula milk: he only ever wanted eight. The nickname stuck. We figure it'd make a pretty good rapper name too.
What makes it different
Most online reaction tests are spacebar-or-click only. This one reads your sim racing pedals directly through the browser (WebHID on Chrome / Edge / Arc, with the Gamepad API as a cross-browser fallback), so the reaction the screen measures is the same one your race seat measures. Mouse, touch, and keyboard fallbacks are there for everyone else.
The penalty
False start three times and your Top 5 best reactions get wiped. Jumping the start is part of the game — just don't make a habit of it.