About GGReflex

GGReflex is fourteen free browser games that put a number on some small piece of what your hands and eyes can do — reaction time, click speed, aim, four kinds of memory, typing, and a few things that are just fun. Everything runs in your browser. Nothing to install, no account, and it works in 23 languages.

How we measure, and what we can't

This is the part most reflex sites leave out, so we put it first. When you take a timing test here, the clock starts when our code decides to show you something and stops when your browser reports your click. Everything in between is in your score — the browser painting the change, your monitor drawing it, light reaching your eye, your brain recognising it, your finger moving, and your mouse reporting the press. Only some of that chain is you.

The hardware is the part we cannot separate out, and we do not pretend to. A 60 Hz screen only redraws every 16.7 ms, so anything we show you can sit finished-but-unseen for most of a frame. A mouse polling at 125 Hz can hold your click for up to 8 ms before reporting it. A web page cannot see any of that, so none of it is subtracted. Your number is your reflexes plus your equipment, and the honest way to use it is to hold the equipment still and compare yourself to yourself.

Where a game shows you a tier — Elite, Pro, Sharp — those are labels we invented so the game would have tiers. They are not thresholds from any study, and we say so on every page that shows them. Where we quote a figure from research, we name the research. Where a number is something players tell each other rather than something anyone measured, we label it as exactly that.

What we don't claim

We are not going to tell you that playing these games will make you better at Valorant, sharpen your brain, or slow your cognitive ageing. The evidence for that kind of transfer is thin, and where we used to imply otherwise on these pages, we have taken it out and said so in the text. Practising a test makes you better at the test. That is a real and mildly satisfying thing, and it is all we are prepared to promise.

We have also corrected ourselves in public where we got things wrong. Our pages used to repeat the widely-quoted claim that elite gamers react in 150–180 ms; standardised testing of esports players actually puts them around 220–290 ms, no faster than trained athletes who don't game. We used to quote a clicking "world record" that does not exist. Those pages now say so. We would rather be the site that admits it was wrong than the one that quietly edits the number.

Our data

Scores submitted to the leaderboard build a live distribution for each game, which we publish openly on the stats page — the median, the spread, and the sample size it is drawn from, updated as people play. The sample is still small, and we show you how small rather than rounding it into something more impressive. You are free to reuse the aggregate figures with attribution.

Who makes it

GGReflex is built by Pong Studio Co., Ltd, a small studio working out of Vietnam. It sits alongside our other things: Toolio, a large set of free browser tools, and Trynkit, which is a good deal less serious. We also make games, and put occasional work on YouTube.

It is a small team, which is why the code is plain HTML and JavaScript with no framework, why the whole site loads in a moment, and why an entire game fits in a file you could read in an afternoon. That is a constraint we have come to like.

Get in touch

Found a bug, spotted a claim we got wrong, or want to talk about something? The contact page is the way in, and corrections are genuinely welcome — this page exists partly because someone will eventually catch something we missed.