Tap instantly when the screen turns green to measure your reflex.
The screen stays dark until a random moment when it flashes green. Tap as fast as you can — your reaction time in milliseconds appears immediately. Five rounds per session, with delays ranging from 400 to 4000 milliseconds. Tap too early and earn a penalty. Averages under 200ms earn the Lightning rating. Track your best and average across sessions to see improvement.
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What's new in the latest 1.0.1
Last updated on Oct 30, 2026
Minor bug fixes and improvements. Install or update to the newest version to check it out!
Download APK on Android with Free Online APK Downloader - APKPure
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