Privacy policy.

1. Overview

waterintakecalci.com ("we," "our," or "the Site") is committed to protecting your privacy. This Privacy Policy explains what information we collect when you visit the Site, how we use that information, and the choices available to you. By using the Site, you agree to the practices described in this policy.

2. Calculator and tracker data (local only)

All calculations performed by the Water Intake Calculator are executed entirely within your web browser. Any hydration tracking progress, glass logs, and daily goals you save are stored exclusively in your browser's localStorage database on your own device.

We do not transmit, host, or have any access to this data. It never leaves your device. Clearing your browser's site data will permanently delete your tracker history.

3. Analytics — Google Analytics 4

We use Google Analytics 4 (GA4), a web analytics service provided by Google LLC ("Google"), to help us understand how visitors use the Site. GA4 may collect the following types of information:

• Pages visited and time spent on each page
• Referring website or search engine
• General geographic region (country or city level)
• Browser type, device type, and operating system
• Interactions with calculator features (anonymized events)

GA4 uses cookies and similar technologies to collect this data. The data is processed by Google and is subject to Google's Privacy Policy. We do not use this data to identify individual users.

You can opt out of Google Analytics tracking by installing the Google Analytics Opt-out Browser Add-on.

4. Advertising — Google AdSense

We use Google AdSense, an advertising service provided by Google LLC, to display advertisements on this Site. Google AdSense may use cookies and web beacons to collect information about your visits to this and other websites in order to display relevant advertisements.

The types of data Google may collect for advertising purposes include:

• Pages and content you view
• Your browsing activity across websites in Google's advertising network
• General location data (country or region level)
• Device and browser information

This data is used by Google to serve interest-based advertisements. We do not personally control which ads are shown and do not have access to the individual-level data collected by Google AdSense.

You can manage your Google advertising preferences or opt out of personalized ads by visiting Google Ad Settings or optout.aboutads.info.

5. Cookies

This Site uses the following categories of cookies and similar technologies:

Most browsers allow you to manage, block, or delete cookies through your browser settings. Note that disabling certain cookies may affect website functionality.

6. No direct personal data collection

We do not directly collect, store, or process personal information such as your name, email address, precise location, or physiological data (such as your exact weight or age entered into the calculator). You do not need to register or create an account to use any feature of this Site.

7. Contact form

If you submit a message through our Contact page, you voluntarily provide us with your name and email address. This information is used solely to respond to your inquiry and is not shared with third parties for marketing purposes.

8. Third-party websites

This Site contains links to external resources including health organizations such as the WHO, NIH, and others. If you click a third-party link, you will be directed to that site. We are not responsible for the content, privacy practices, or data handling of any external website.

9. Children's privacy

This Site is not directed toward children under the age of 13. We do not knowingly collect any personal data from children. If you believe a child has inadvertently submitted personal information, please contact us so we can take appropriate action.

10. Your rights (GDPR & CCPA)

Depending on your location, you may have the following rights regarding your personal data:

• Right to access — request a copy of data held about you
• Right to correction — request correction of inaccurate data
• Right to erasure — request deletion of your data
• Right to object — opt out of certain data processing activities
• Right to opt out of sale — California residents may opt out of the sale of personal information

As we do not directly collect personal data beyond voluntary contact form submissions, most rights requests should be directed to Google for data collected through their services. For contact form data, please reach out via our Contact page.

11. Data retention

Your local hydration tracker data is retained in your browser's localStorage until you clear it. Google Analytics data is retained for 14 months by default before automatic deletion, as per Google's data retention settings. Contact form messages are retained only as long as necessary to respond to your inquiry.

12. Changes to this policy

We may update this Privacy Policy from time to time. When we do, we will revise the "Last updated" date at the top. We encourage you to review this page periodically. Continued use of the Site after any changes constitutes acceptance of the revised policy.

13. Contact us

If you have questions or concerns about this Privacy Policy or our data practices, please contact us via our Contact page.