reactionmetric.com
ReactionMetric
Free browser reaction-time benchmark with five-trial sessions, median, best and consistency results, plus clear browser and device timing limits.
Baskollen91Measured 30 Oct 2026 · Method 4Agent Visibility91Measured 30 Oct 2026 · Method 1
The story behind ReactionMetric
How it's built
Built with Codex, including AI-assisted code and graphics. The browser reaction test uses JavaScript timing and explains device and browser latency limits.
Visit ReactionMetricOpens in a new tab.