☕

Build Website Upgrade Support Login Register

🙏 Ads help keep ToolNest free. Thank you for your support! ❤️

Reaction Time Tester

Tap as fast as possible when the screen turns green.

Tap when the screen turns GREEN!

Your Time: 0 ms

Best: -- ms

Reaction Time Tester

Measure how fast you react when the screen changes color.

Works on mobile and desktop
No install and no login
Fast loading, touch-friendly controls