Have you ever wondered how good your reaction time is? Test your friends and family and see who reacts the fastest to red, yellow, and green light.

- Download the app on 2 iPhones or iPads and connect when on the same Wi-Fi network.
- Place on device 7 or 10 feet away and standing up so that you can see it
- Use the other device to "react" when a color appears on the display device.
- Have other people try it and compare and share the results!

Ratings and Reviews

5.0 out of 5
1 Rating

1 Rating

mposports ,

Many uses

I was able to use this app for my stem fair project and I couldn’t have done it without this app.

App Privacy

The developer, Ryan O'Connor, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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