A Reaction Time Test That Goes Beyond One Random Tap
Most online reaction tests give you a single number and walk away. SERO grades that number against age-banded scientific benchmarks, tracks variance, and ranks you globally.
Why One Tap Is Not Enough
Reaction time has high run-to-run variance. A single 240 ms tap tells you almost nothing. SERO uses multiple stimuli, calculates median + standard deviation, and grades the result against published age-banded curves.
What You Get That a Basic Test Skips
Neuro-IQ tier, near-miss analytics, global leaderboard, country rank, and a shareable result page. All free, no signup, no install.
Run a real benchmark
FAQ
Is SERO more accurate than basic online tests?
It uses input-latency compensation and server-side validation, so phone and laptop scores are directly comparable — which most basic tests cannot offer.
Do I need to sign up?
No. Optional account only if you want to keep a permanent profile and join the global leaderboard.
How long does the test take?
About 90 seconds for a stable score.