ToolLaunched
ReactionMetric
Measure browser-observed reaction time in repeatable five-trial sessions.
- Built with
- Codex
- Stack
- JavaScript
- Category
- Tool
- Stage
- Launched
- Website
- reactionmetric.com
- Listed
- 29 October 2026
- Views
- 0
- Saves
- 0
About ReactionMetric
ReactionMetric is a free browser-based reaction-time benchmark. Complete five trials to see median, best and consistency results. The site explains how browser and device latency affect measurements. The core test works without mandatory signup. Built with Codex, including AI-assisted code and graphics.