Reflex is a simple app to check your reaction time. The average reaction time for humans is 250 milliseconds to a visual stimulus, 170 milliseconds to an audio stimulus and 150 milliseconds to a touch stimulus. To compare your reaction time to others, just sign in with your Google Play Games account and take a look at the public leaderboard.
Please note that, due to different hardware configurations, there might be a slight latency when delivering your result, but not to an extent where it could greatly affect the final result.
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