Privacy and cookies
This site uses no advertising cookies and builds no profiles. It does count visits in aggregate, to know which materials turn out to be useful.
Cookies
We store no cookies or other persistent identifiers on your device. There are no advertising, personalisation or tracking cookies, which is why we don't show you a box to accept or reject them.
Audience statistics
We use Vercel Web Analytics to get basic, aggregated statistics. It may record the page visited, the referring page, the date and time, the approximate country or area, and technical data such as device type, browser and operating system. It does not receive your name, your email or your answers to the exercises.
No tracking across days or sites
Vercel derives an identifier from the connection request in order to tell visits apart within a single day. That identifier is renewed after 24 hours and cannot be used to follow your browsing across different sites. What we see are aggregated statistics.
Your exercises stay in the browser
The answers you type while practising or playing are marked on your device. They are not sent to Vercel Web Analytics, they are not stored on the server, and they disappear when you close the page.
No accounts and no advertising
There is no sign-up, no accounts, no passwords and no learner profiles. There are no ads either, no embedded social media buttons and no advertising measurement.
If this changes
If non-essential cookies were added in the future, this notice would be updated and permission would be asked before switching them on.
Last updated: 23 August 2026.