1. What we collect
We **do not collect any personally identifiable information**. All inputs you type on a tool page (amounts, height, weight, dates, files etc.) stay **in your browser memory** — they are never sent to our servers and are not persisted.
2. Anonymous analytics
We use anonymous analytics (Baidu Tongji / Umami) to record aggregate metrics such as page views and device types. You can block these via Do-Not-Track or ad blockers.
3. Performance metrics
We collect anonymous Core Web Vitals (LCP / INP / CLS) to optimise the site. These metrics contain no content data.
4. Cookies
We do not use tracking cookies. The only browser-local value is your language preference (`locale` in localStorage), stored on your device only.
5. Advertising
Once commercial rollout begins, we may show non-intrusive ads. Ad networks (e.g. Google AdSense) may record anonymous data per their own policies.
6. Your rights
Since we do not hold personal data, there is no need to file deletion requests. To disable performance metrics, enable DNT in your browser.