1. Local-first data architecture.
All calculations performed on the **Water Intake Calculator** are executed in your browser. Any hydration tracking progress, glass logs, or daily goals you save are stored strictly inside your web browser's localStorage database. We do not host, store, or transmit your logs to any remote servers. Clearing your browser cookies/cache will reset your tracking data.
2. Zero personal information collection.
You do not need to register, create an account, or log in to use our services. We do not collect names, email addresses, physiological indicators (such as exact weight or age), or location data.
3. Cookies and analytics.
We do not use tracking cookies or advertising pixels. We may use privacy-centric, cookieless analytics providers (such as Vercel Analytics) to collect anonymous technical statistics (like browser type, operating system, and page views) to monitor performance and improve usability. None of these parameters are linked to individual identities.
4. Third-party websites.
Our site contains links to other health resource sites (like WHO, ACSM, or IOM). If you click on a third-party link, you will be directed to their page. We are not responsible for the privacy practices of external domains.
5. Contact and questions.
If you have any questions about this Privacy Policy or how your local data is managed, feel free to reach out to us via our Contact Page.
Last updated: June 8, 2026