LightsOut

This is a simple app to measure your reaction time.

Formula 1 races start with five lights going out. This app simulates Formula 1 starts.

You can start the test by holding the area indicated by the dashed line. The five lights turn on at one-second intervals and go out after a random time. When all lights went out, release as quickly as you can.

Your test results are automatically saved to local rankings. If you want to save to online ranking, add a name with the save button.