Last updated: May 4, 2026
This Privacy Policy describes how TDEE.TECH ("we," "us," or "our"), operating at tdee.tech, collects, uses, and shares information when you use our website. We are committed to protecting your privacy.
1. Information We Collect
a) Calculator Inputs (Not Collected)
All calculator inputs — including age, weight, height, gender, and activity level — are processed entirely within your browser using JavaScript. This data is never transmitted to our servers and is never stored anywhere.
b) Usage Analytics (Google Analytics 4)
We use Google Analytics 4 to collect anonymous, aggregated usage statistics including: pages visited, session duration, browser type, device type, and general geographic region (country/city level). This data cannot identify you individually. Google Analytics uses cookies to distinguish unique visitors.
You can opt out using the Google Analytics Opt-out Browser Add-on.
c) Visitor Counter (Firebase Realtime Database)
We maintain a daily counter of calculator uses via Firebase Realtime Database. This stores only: a date string (e.g., "2026-05-04") and an integer count. No personal information is associated with this counter.
2. Google AdSense and Advertising
We display advertisements on this website through Google AdSense. Google AdSense uses cookies and web beacons to serve ads based on your prior visits to this and other websites. This allows Google to display personalized advertisements.
You can opt out of personalized advertising at any time by visiting Google's Ad Settings or www.aboutads.info.
Google's use of advertising cookies enables it and its partners to serve ads based on your visit to our site and/or other sites on the Internet. For more information, see Google's Advertising Policies.
3. Cookies
We do not set first-party cookies ourselves. The following third-party cookies may be present:
- Google Analytics (_ga, _gid, _gat): Used to distinguish users and throttle request rate.
- Google AdSense (IDE, DSID, NID): Used to show personalized advertisements.
You can control cookies through your browser settings. Disabling cookies may affect ad personalization but will not impact the functionality of our calculators.
4. Third-Party Services
- Google Analytics: Privacy Policy
- Google AdSense: Privacy Policy
- Firebase (Google): Privacy Policy
- Google Fonts: Served from Google CDN — Privacy Policy
5. GDPR (European Users)
If you are located in the European Economic Area (EEA), you have the following rights under GDPR:
- Right to access the personal data we hold about you
- Right to rectification of inaccurate data
- Right to erasure ("right to be forgotten")
- Right to restrict processing
- Right to data portability
- Right to object to processing
Since we do not collect personal data through our calculators, there is no personal data stored on our servers to access or delete. For data held by Google Analytics or AdSense, please use Google's Privacy Controls.
6. CCPA (California Users)
If you are a California resident, you have rights under the California Consumer Privacy Act (CCPA), including the right to know what personal information is collected, the right to delete personal information, and the right to opt-out of the sale of personal information. We do not sell personal information.
7. Children's Privacy
Our website is not directed to children under the age of 13. We do not knowingly collect personal information from children. If you believe a child has provided personal information, please contact us immediately.
8. Changes to This Policy
We may update this Privacy Policy from time to time. The "Last updated" date at the top of this page indicates when the policy was last revised. Continued use of our website after changes constitutes acceptance of the updated policy.
9. Contact Us
If you have questions or concerns about this Privacy Policy, please visit our Contact page.