價格：免費
檔案大小：12.7 MB
版本需求：需要 iOS 9.1 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：英語
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!
支援平台：iPhone, iPad