Privacy Policy

Effective date: 2026-11-10

1. Information we collect

There are no accounts on this site, and we don't directly collect personal information such as your name, email address or phone number. Your quiz answers are calculated inside your browser.

1a. Anonymous stats (optional)

Only if you press "Add my score & see my rank" on the result card, the items below are stored on our server (Cloudflare). If you don't press it, nothing is sent.

• What we store: country of residence, age group, difficulty score, language edition and date.
• What we don't store: name, email, IP address, device information or any other answers.
• What it's for: showing "top X% hardest" worldwide, in your country and in your age group, and the average difficulty ranking by country. Groups with fewer than 30 people are never shown.
• Retention: kept for as long as we publish these stats. Because the data can't identify you, we can't look up or delete a specific person's entry.
• Duplicate check: your browser keeps a small marker so the same result isn't sent twice on the same day. The marker stays on your device.

2. Information created automatically

Our hosting provider (Cloudflare) may briefly log technical information such as IP address, time of visit and browser type for security and to deliver the site. We don't use this information to identify you.

The site remembers a couple of small preferences on your device using your browser's local storage (for example, the country/region you picked at the bottom of the page). This stays on your device and is never sent to us.

3. Advertising and cookies

This site shows ads through Google AdSense. Third-party vendors, including Google, use cookies to serve ads based on your prior visits to this site and other websites.

• Google's use of advertising cookies lets it and its partners serve ads based on your visits to this site and others. Learn more in how Google uses cookies in advertising.
• You can opt out of personalized advertising in Google Ads Settings. To opt out of other vendors' personalized ads, visit aboutads.info.
• Visitors in the European Economic Area, the UK and Switzerland will see a consent message on their first visit, and can change their choice at any time from that message.
• You can block or delete cookies in your browser settings. The quiz still works without them.

4. Outside services

Fonts are loaded from Google Fonts, which means some connection information may be sent to Google's servers. If you click a source link on your result, you'll go to that outside website, and its own policies apply.

5. Children's privacy

Because this site doesn't collect personal information, it doesn't knowingly collect personal information from children under 13.

6. We don't sell your data

We don't collect personal information, so we have none to sell or share. Choices about ad personalization are covered in section 3.

7. Contact

For privacy questions, please use the details on our Contact page.

8. Changes

If this policy changes, we'll post the update on this page with a new effective date.