Trẻ học vuiPrivacy and analytics
Trẻ học vui requires no account and never collects your child's name, email, or phone number.
Game data stays on the device
Profiles, per-round history, progress, best scores, and sound settings are stored locally in the browser. The site never sends profile names, profile IDs, individual moves, or individual answers to Google Analytics.
What does Google Analytics measure?
The site uses Google Analytics 4 with measurement ID G-YLYNJN648W to measure visits, sessions, pages viewed, referral source, scroll and link clicks, language, browser/device type, and approximate geographic region.
Analytics measurement cookies
analytics_storage is set to granted. GA4 uses first-party cookies _ga and _ga_* holding a random ID to distinguish browsers and keep sessions; Google's published default lifetime is 2 years, and browser limits can shorten it.
Usage events and aggregate results
Analytics receives category/game selections, opening-closing the parent panel and settings, sound toggles, guide views, fullscreen requests, PWA install status, Facebook/Discord/Zalo clicks, opened share sheets or copied game links and the share method, game start/completion, duration, and numeric metrics like level, score, attempts, errors, or correct answers.
No ad personalization
Google Signals, ad storage, user data for ads, and ad personalization are all disabled. The site never sets a User-ID, and never sends names, emails, phone numbers, free-text input, or GPS location.
Error and performance reporting via Sentry
On the official site, Sentry receives technical errors and samples 20% of performance traces to help fix bugs. Session Replay is disabled; the site never sends your child's profile or progress to Sentry.
Contact
Questions about privacy, requests to delete a child's data, new game suggestions, or bug reports can be sent by email to the Trẻ học vui team. [email protected]
More information for parents
- Google processes the connecting IP address to infer an approximate location, then discards the IP before recording GA4 data.
- Event data in Google Analytics is kept per the Analytics property retention setting; cookies and local data have their own separate lifetimes.
- Parents can block Google Analytics using the browser's tracking-protection settings or a content-blocking extension.
- Profiles, progress, and cookies on the device can be cleared using the browser's site-data deletion feature.
- Avoid putting names, emails, phone numbers, or other personal information in the URL when sharing the site.
See also Google's privacy policy, what Google Analytics collects, GA4 cookies and Sentry's privacy policy.
Last updated: 2026-08-14