"Reaction Test Speed and Age" is a lifestyle app available on iPhone. The app allows users to test their reaction speed through 5 stages and provides them with their results along with an estimated age based on their reaction speed. Users can also compete in a leaderboard and share their results with friends.

This app offers a fun and interactive way for users to assess their reaction speed and compare their performance with others. With the ability to compete in a leaderboard and share results, "Reaction Test Speed and Age" provides an engaging experience for users looking to test their reflexes.