A brain-game app that won't lie to you.

Why free?

Because the games are cheap to run and the honest version of this product shouldn't sit behind a paywall. CortexCrunch is supported by a single, unobtrusive ad on each page — that's it. No "free trial" that bills you in seven days, no locked games, no upsell pop-ups, no account required. Play as much as you want, forever, for nothing.

If the ads ever cover the costs and then some, that's the whole business model working as intended: you get a genuinely useful tool, and a small banner quietly keeps the lights on. That's the deal, stated plainly.

Why honest?

The brain-training industry earned its bad reputation by overselling what its games could do. We think there's a real, lasting advantage in being the company that simply tells the truth: these are fun, measurable exercises for attention, speed and memory — not medicine, not a dementia shield, not an IQ booster. Read our full position on the science page.

Who's behind it?

CortexCrunch started as a single-file prototype with two games and a stubborn idea: that "brain games without the BS" could be a category of one. It's grown into a small daily set of six, and it'll keep growing — carefully, and without ever crossing the line into claims we can't back up.

Your privacy

There's no account and no login, so there's nothing to hack. Your scores are saved in your own browser, on your own device — not on our servers. Clear your browser data and they're gone. We use Google AdSense to show ads, which involves cookies; you can read the details in our privacy policy.