YOU FAST? – Reaction Time Test
Reflex Trainer & Reaction Test
About
Test your reflexes with a game inspired by Formula 1 starting lights. Tap as quickly as possible when the lights go out and measure your reaction time to the millisecond. Track your personal bests and compare your speed to others.
What's New in YOU FAST?
1.4
May 3, 2026
Polished the UI for smaller iPhones — everything fits better now. Plus a few small bug fixes.
Developer apps
FAQ
How does YOU FAST? test reaction time?
YOU FAST? uses a sequence of F1-inspired starting lights. You must tap the screen as soon as the red lights disappear. The app measures your reaction time down to the millisecond.
What are the reaction ratings in YOU FAST?
The app provides reaction ratings ranging from 'Average' to 'Superhuman', allowing you to gauge your performance against a benchmark.
Can I track my progress in YOU FAST?
Yes, YOU FAST? features personal best tracking and statistics to help you monitor your improvement over time.
Does YOU FAST? have ads?
No, YOU FAST? does not contain advertisements, providing an uninterrupted user experience.
Can I challenge my friends with YOU FAST?
Yes, you can share your scores and challenge your friends to see who has the fastest reflexes.
What devices is YOU FAST? available on?
Currently, YOU FAST? is supported on iPhones.
How often is YOU FAST? updated?
The app was last updated on May 3, 2026, with version 1.4. This indicates a recent update, suggesting ongoing development and support.
What is the age rating for YOU FAST?
YOU FAST? has an age rating of 4+, making it suitable for a wide range of users.
