document
Privacy
In short: no cookies, no analytics, nothing sent to a server. Everything stored stays in your browser.
What is stored in your browser
The site uses localStorage, not cookies. This data never leaves your device.
*:best:*— best results per quiz and mode: score, duration and date.countries-quiz:theme— your light or dark theme choice.achievements:v1— unlocked achievements and their dates.daily:last,daily:streak,daily:best— daily quiz streak and record.
If storage is unavailable (private mode, blocked by settings), the quiz still works — it just cannot keep your record or theme.
What is not here
- no cookies and no third-party trackers;
- no Google Analytics, Yandex Metrica or ad pixels;
- no accounts, forms or newsletters;
- no external fonts, CDNs or scripts from other domains.
Server logs
The server keeps standard nginx logs: IP address, date, page URL and user-agent. They are used for security and diagnostics only, are not linked to quiz results and are not shared with third parties. Retention: up to 30 days.
How to delete data
Clear site data in your browser settings, or use a private window. Your record and theme will be reset.
External data
The map is built from Natural Earth data, country names and codes from the open world-countries dataset, flags from flag-icons (MIT). All of it is bundled at build time; nothing is requested from third-party servers while you play.