Privacy policy

1. What we collect

Your test answers, the date and duration of each test, your chosen language, and a random identifier stored in your browser (a cookie). If you log in with Telegram, we also keep your Telegram ID, name, username and Telegram language; with Google, your Google account ID and name (not your email). We never store your phone number, email, IP address or location.

2. Account (optional)

The tests work without an account. To see your results on any device you can log in with Telegram or Google. With Telegram, the bot sends a one-time code that you enter on the site. With Google, we keep only your Google account ID and name, and never ask for your email. When you log in, the results in that browser are linked to your account. One account can have both methods. For now the bot only sends sign-in codes. When the site is opened inside Telegram (from the bot's menu), Telegram passes us your name and Telegram ID: if you have an account, you are signed in automatically; if not, nothing is stored, and an account is created only if you tap “Sign in with Telegram”.

3. Cookies

The Site uses one essential cookie (“tl_sid”). It carries your answers from one test to the next and lets us show you your result. It lasts one year. No advertising or tracking cookies are used. If you log in, the same cookie keeps you signed in.

4. How we use data

Answers are used to show you your results and to calculate anonymous statistical norms. Data is not sold and is not shared with third parties for advertising. If you join the daily-puzzle leaderboard, the nickname you choose, your number of correct answers and your time are visible to other visitors. You can remove your nickname at any time.

5. Third-party services

The Site's fonts load from Google Fonts, which means your browser contacts Google's servers. If paid services are introduced, payments will go through licensed payment providers, and card details will never be stored by us. Sign-in codes are delivered through Telegram. Google sign-in happens on Google's side and is covered by Google's privacy policy. Inside Telegram, the page loads Telegram's Mini App script from https://telegram.org; in an ordinary browser it does not.

6. Retention and storage

Anonymous answers may be kept indefinitely so that research norms can keep improving. Data is stored on a secured server.

7. Your rights

Answers given without an account are not linked to your identity: delete the cookie in your browser and the link to them is broken, leaving anonymous data that belongs to no one. If you have an account, you can delete it, with every result linked to it, at any time on the “My account” page.

8. Age limit

The Site is intended for users aged 16 and over.

9. Changes

When this policy is updated, the new version is published on this page.