About Reaction Rally

Reaction Rally is a set of free tests you take in the browser: reaction time, click speed, typing, memory and mental maths, plus checks for your keyboard, mouse, screen, microphone and speakers. Scores and personal bests stay in your browser. No sign-up.

What you will find here

Each tool does a single job and works on a phone as well as on a laptop. There is nothing to install and no account to create.

The tools run in your browser. Results you save stay on your device: they are not sent to us. Our privacy page explains this in detail.

Who runs it

Reaction Rally is published by Click Clack Labs LLC, based in the United States. You can reach us through the contact page.

How the site pays for itself

The site does not show advertising at the moment. If that changes, this page and the privacy page will say so.

How pages are checked

Pages are checked as we go: lists are read against their sources. Read the editorial standards for the details and for how to report a mistake.