OneFreePlace
FREE ONLINE TOOL

Free Reaction
Challenge

Wait for green, then react as quickly as you can. Clicking early counts as a false start.

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FreeUse this tool without paying.No sign upStart with the tool right away.Clear stepsRead the tool’s own guidance.

About Free Reaction Challenge

Measure pure visual response, target acquisition, and impulse control in one polished circuit. Timing uses the browser’s high-resolution clock and never invents percentiles.

Available actions

  • ⚡ Quickdraw
  • ◎ Target Switch
  • ◉ Go / No-Go
  • ☀ Daily Circuit
  • Start
  • Reset