Privacy

Last updated: September 23, 2026

This page describes how GreenWattWise Lab (greenwattwiselab.com) actually handles data today. It is reviewed whenever a new analytics provider, cookie-based feature, or other tracking technology is added or changed — see docs/legal/TRACKING_AUDIT.md in the site repository for the underlying technical audit this page is based on.

This site does not collect payment details, does not have a contact form or newsletter signup, and does not knowingly collect personal data directly from visitors browsing the site itself.

Hosting

This site is hosted on Vercel. Like most hosting providers, Vercel's infrastructure generates standard server-level request logs as part of operating the site; these are Vercel's platform logging, not a custom analytics feature added by GreenWattWise Lab.

Analytics

Vercel Web Analytics is active on this site by default. It is a first-party, cookie-less analytics service: it reports aggregate page-view and event data without setting a persistent cross-site identifying cookie in your browser.

Google Analytics (GA4) is used only if you consent to it. When you first visit, a notice asks whether you accept analytics cookies; until you choose “Accept analytics”, no Google Analytics script is loaded, no Google Analytics cookie is set, and no data is sent to Google. If you accept, GA4 sets first-party cookies (_ga, _ga_<ID>) and sends usage data — pages viewed and clicks on tracked links such as product and purchase buttons, the calculator, the language switcher and embedded videos — to Google under Google's own privacy policy. Your choice is stored in your browser's local storage, and you can change or withdraw it at any time via “Cookie settings” in the footer; withdrawing stops GA4 and deletes its cookies. GA4 never receives your name, email address, phone number, or payment details, and it does not track purchases made through Gumroad.

Cookies

Vercel Web Analytics does not use cookies. Google Analytics sets cookies only after you accept analytics cookies, as described above. Your consent choice itself is stored in your browser's local storage, not in a cookie. This site does not use cookies for advertising, and no advertising or marketing pixels (for example Meta Pixel, Google Ads, TikTok, or LinkedIn tracking) are present in the site's code.

Embedded video

Some pages embed YouTube videos using YouTube's privacy-enhanced mode (youtube-nocookie.com), which does not set YouTube tracking cookies unless and until you choose to play a video. Playing an embedded video loads content from Google-owned infrastructure, which operates under Google's own privacy policy.

External services and links

GreenWattWise Lab's paid products are sold through Gumroad. This site links out to Gumroad product pages; it does not embed Gumroad's checkout on this site, and no Gumroad script runs on greenwattwiselab.com itself. Purchases, payment details, and checkout data are handled entirely by Gumroad under Gumroad's own privacy policy (see gumroad.com/privacy), not by GreenWattWise Lab directly. See Terms of Sale & Digital Product Terms for how checkout and delivery work.

Calculators

The free battery-size calculator and the household inputs you enter into it run in your own browser; this site does not transmit or store the figures you enter there.

Fonts

This site uses your device's own system fonts rather than a web-font service, so no request is made to a third-party font provider such as Google Fonts.

Contact

Questions about this policy can be sent to greenwattwiselab@gmail.com.

This policy does not claim any specific legal-compliance certification. Analytics consent is handled by the site's own minimal consent notice, not a third-party consent platform. See the legal overview page for the rest of this site's legal documents.