The website measures its traffic. The companion apps collect nothing at all. Here is the whole of it.
We use Google Analytics to understand how this site is found and read — which pages are visited, roughly where visitors come from, and what kind of device they use. It sets cookies in your browser and sends usage data to Google, which processes it on our behalf under Google’s privacy policy.
That is the only tracking here: no advertising scripts, no social embeds, no accounts, and nothing is ever sold. If your browser or an extension blocks analytics, every page on this site still works.
The apps have no server. Your answers, scores, streak, bookmarks and study plan are stored in your own browser, on your own device, and are never transmitted anywhere. That is also why clearing your browser data clears them — each app offers a “download my progress” button for that reason.
The apps ask for no account, no email address and no permissions. Audio Study Mode uses the speech engine already built into your browser; no audio is sent anywhere.
We keep the message so we can answer it and track the correction it reports. We do not add you to any mailing list.
If you ask to be told when an upcoming book ships, we keep your address for exactly that: one email when it is published. It is not a newsletter and it is never shared.
Our book pages link to Amazon, and our guides link to government sources. Those sites have their own privacy practices, which we do not control.
