# ReactionMetric F1 Reaction Test
> Five-light browser reaction challenge with median, best launch and consistency results
- URL: https://reactionmetric.com/f1-reaction-test/
- Visit (tracked): https://promoteindex.com/go/reactionmetric-f1-reaction-test
- Category: game
- Built with: codex
- Pricing: free
- Game availability: playable (maker-reported)
- Game AI use: ai-assisted
- Game platforms: browser
- Play: https://promoteindex.com/go/reactionmetric-f1-reaction-test?placement=games&target=play
- Votes: 1
- Tested by PromoteIndex: no. Not tested by PromoteIndex yet. Use at your own risk.
- Listed: 2026-10-28
- Tags: browser-game, reaction-time, timing, casual
A free browser five-light reaction challenge. Wait for lights-out, then click, tap or press Space. False starts are tracked; five valid starts report median, best launch and consistency, with browser/device timing limits explained. Independent and not affiliated with Formula 1. AI assisted code and graphics.
Listing: https://promoteindex.com/p/reactionmetric-f1-reaction-test

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