Contact Us

Have a question about the reaction time test, found a bug, or have an idea to make the site better? We'd love to hear from you.

What to include in your message

A few details help us understand your message and reply more quickly.

Reporting a bug or problem

• the page and language you were using
• your device, such as a laptop, phone, or tablet, and its operating system
• your browser and, if you know it, the browser version
• what you expected to happen, what happened instead, and the steps that led to it
• a screenshot, if you can

Questions about your results

Your individual times stay in your browser, and results added to the chart are anonymous, so we can't look up your results. If your question is about specific results, include your times in your email.

Translation corrections

Tell us the language, the text that looks wrong, and your suggested wording.

Privacy requests

Tell us what you're asking for, such as access to or deletion of information about you. To see what information is collected, read our Privacy Statement.

Before you write

• We can't give medical advice or interpret results for health purposes. If you're concerned about your reaction time or your health, please talk to a doctor. For more, see our Disclaimer.
• Please don't include sensitive information, such as passwords, financial details, or health information, in your message.
• For tips on getting accurate results, see our About page.