About CheckReactionTime#

CheckReactionTime is a minimalist platform built to help you measure, train, and improve your reaction time, reflex speed, and cognitive performance.

We create fast, accurate, and distraction-free online tools used by gamers, athletes, students, and professionals around the world.

Our Mission#

Our mission is simple: to build high-quality performance testing tools that are free, accurate, and enjoyable to use.

In a world full of noisy apps and distractions, we focus on minimal design, precise measurement, and meaningful feedback — so you can track real improvement over time.

Whether you’re training for competitive gaming, improving your athletic performance, or simply curious about your cognitive abilities, our tools provide the data you need to measure and monitor your progress.

What We Build#

At CheckReactionTime, we build online tools and games that help measure and improve:

• Reaction time and reflex speed – Visual stimulus testing with millisecond precision
• Focus and attention – Track your alertness and mental sharpness
• Cognitive performance – Monitor brain processing speed over time
• Hand-eye coordination – Essential for gaming and sports performance

Our most popular tool is the Reaction Time Test, designed to work smoothly on desktop, tablet, and mobile devices. It features comprehensive analytics, progress tracking, and performance comparisons to help you understand and improve your reflexes.

Accuracy & Methodology#

We design our tests to be simple, fast, and scientifically grounded.

Reaction time is measured in milliseconds based on the exact moment you respond to a visual stimulus. We minimize delays by using:

• Lightweight code – Optimized for minimal processing overhead
• High-precision timers – JavaScript performance APIs for accurate timing
• Optimized rendering – Smooth visual transitions without lag
• Local data storage – Your results stay on your device for privacy

Please note that device latency, screen refresh rate, and browser performance may slightly affect results. Factors like input lag, display response time, and system performance can add 10-30ms to measurements. For most accurate results, use a device with a high refresh rate display (120Hz+) and wired peripherals.

Our tools are intended for training and self-measurement, not for medical or diagnostic use.

Who Uses CheckReactionTime?#

Our tools are used by a wide range of people, including:

• Gamers – Training reflexes for FPS, MOBA, and competitive esports
• Athletes – Improving reaction speed for tennis, baseball, martial arts, and combat sports
• Esports professionals – Daily warm-up routines and performance monitoring
• Drivers – Testing and maintaining quick reaction times for safety
• Students – Measuring focus, attention, and cognitive performance
• Researchers – Collecting data for studies on reaction time and cognition
• Anyone curious about their reaction time – Benchmark yourself against population averages

Whether you’re training seriously or just having fun, CheckReactionTime is built for you.

Our Values#

We are committed to building tools that respect our users:

✔ Free and accessible – No paywalls, no premium features locked away
✔ Privacy-friendly – No hidden tracking, no data selling, no accounts required
✔ Transparent results – Clear benchmarks and honest comparisons
✔ Clean, minimalist design – Focus on functionality over flashy distractions
✔ Continuous improvement – Regular updates based on user feedback
✔ Open development – Built with modern web standards and best practices

Privacy commitment: We do not collect personal data. Your test results are stored locally in your browser and never transmitted to our servers unless you explicitly choose to share them. We use minimal analytics only to improve the user experience.

About the Creator#

CheckReactionTime is created and maintained by an independent developer passionate about performance optimization, user experience, and human-computer interaction.

With a background in building fast, responsive web interfaces and interactive tools, the goal behind CheckReactionTime is to combine clean design with precise measurement to create tools people actually enjoy using and find genuinely useful for improvement.

The project started as a personal tool to track gaming performance improvements and evolved into a full-featured platform used by thousands of people worldwide. Every feature is carefully considered to provide value without adding complexity.

Technical Excellence#

CheckReactionTime is built with modern web technologies:

• Astro – Fast, content-focused web framework
• React – Interactive UI components
• TypeScript – Type-safe, maintainable code
• Nanostores – Lightweight state management
• Recharts – Beautiful, responsive data visualization
• TailwindCSS – Clean, responsive design

The entire platform is optimized for speed, with minimal JavaScript, instant page loads, and smooth interactions even on older devices.

Contact & Feedback#

Have feedback, feature ideas, or questions?

You can reach us through:

• Email: vivekgupta@ninjatype.com
• GitHub: VivekGupta137/reactiontimecheck

We love hearing from users and actively improve our tools based on your suggestions. Common feature requests we’re working on:

• Leaderboards and global rankings
• Custom training programs
• Additional test modes (audio reaction time, choice reaction time)
• Mobile app versions
• Advanced statistics and trend analysis

Your feedback shapes the future of CheckReactionTime!

Roadmap & Future Development#

We’re constantly working to improve and expand our platform. Upcoming features include:

• Multiple test modes – Choice reaction time, audio reaction time, complex patterns
• Training programs – Structured improvement plans with goals and milestones
• Social features – Compare scores with friends, team challenges
• Export data – Download your complete history for external analysis
• API access – Integrate reaction time testing into your own projects

Stay tuned for updates, and thank you for using CheckReactionTime!

CheckReactionTime provides free online reaction time tests and brain training tools designed to help you measure and improve your performance. Our platform is trusted by users worldwide for fast, accurate, and distraction-free testing with comprehensive analytics and progress tracking.