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ReactionMetric
ReactionMetric — Measure browser-observed reaction time in repeatable five-trial sessions.
About ReactionMetric
Free no-signup browser reaction-time benchmark with repeatable five-trial sessions, median/best/consistency results, and transparent browser/device measurement context.
- Who it is for
- People measuring their own browser-observed visual reaction time.
- Problem it solves
- A single reaction attempt does not show a repeatable baseline, and browser/device latency affects observed timing.
- The solution
- Runs five trials and reports median, best and consistency, without signup or payment.
- What makes it unique
- Repeatable five-trial sessions with transparent browser/device measurement context.
Features
Repeatable five-trial sessions
Reports median, best and consistency with browser/device measurement context.
Details
- Platforms
- Web
- Pricing
- Free
- Built for
People measuring their own browser-observed visual reaction time.
- Building since
2026
Technology
Website performance
Independent mobile lab measurements and permanent weekly competition results from IndieTools Speed.
100ExcellentMobile Lighthouse
Last checked
- Load time
- 326 ms
- FCP
- 901 ms
- LCP
- 1.06 s
- CLS
- 0.003
- TTFB
- 2 ms
- TBT
- 0 ms
- Speed index
- 1.65 s
Latest Performance Score: 100. Measured: October 17, 2026. Weekly Overall Rank: not finalized. LCP: 1.06 s. Load Time: 326 ms.
- Overall rank
- Not finalized
- Best overall rank
- Not finalized 0 top 10 finishes
- Best category rank
- Not finalized 0 category wins
- Latest change
- 21 ms faster No finalized score yet
Website performance history
Inspect every successful mobile Lighthouse lab measurement by metric and date range.
Range
Metric
Latest score
100 / 100
Higher is better
2 measurements
Use the left and right arrow keys to inspect measurements. Use Home or End to jump to the first or last measurement. Press Escape to dismiss the chart tooltip.
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