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Cookie Policy

How GaugeH2 uses cookies and similar technologies.

Last updated: October 2026

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What Are CookiesEssential CookiesYour Language ChoiceOther StorageUsage AnalyticsHow to Manage Cookies

What Are Cookies?

Cookies are small text files that a website places on your device when you visit it. They are widely used to make websites work correctly, to provide security, and to give website operators information about how their site is being used.

We use cookies and similar technologies to operate the platform. We do not use tracking or advertising cookies, and our analytics are cookieless (see below).

Essential Cookies

These cookies are necessary for the Service to function and cannot be disabled. They do not track you across other websites and contain no personal information beyond what is needed to maintain your session.

CookiePurposeDuration
sb-[project]-auth-tokenYour signed-in session (Supabase). Set when you sign in and removed when you sign out; after 30 days without use the session ends and you sign in again. Split into numbered parts (.0, .1) when it is large.Up to 400 days, renewed while you use the Service
gh2_gateAccess to the site before its public launch. Set only if you enter the access password. No longer used once the Service opens to the public.30 days

Note: Stripe’s checkout is hosted on Stripe’s own domain. Any cookies set during payment are placed by Stripe on its domain, not by GaugeH2 on this site.

These cookies are set in compliance with Article 5(3) of the ePrivacy Directive and do not require your prior consent as they are strictly necessary for the provision of the service you have requested.

Your Language Choice

You can choose the language of the interface (English, Spanish, Portuguese, French or German) in the language selector. If you do, we remember that choice in one cookie, for gh2.ai and app.gh2.ai. It is set only when you make that choice, holds nothing but the language code, and is used for nothing else.

CookiePurposeDuration
gh2_langThe language you chose for the interface. Set only when you choose one.365 days
gh2_temaThe colour theme you chose (light, dark or your system’s). Set only when you choose one.365 days

Until you choose a language, none is stored: each visit is shown in the language of the country it comes from, as reported by our hosting provider, or else the one your browser asks for, and in English otherwise. Neither is kept.

Because it only keeps a choice you make yourself, it does not need your prior consent under Article 5(3) of the ePrivacy Directive. Reports, legal texts and this policy stay in English.

Other Storage on Your Device

These small items are kept in your browser’s own storage. None of them is sent to us or to anyone else.

NameStoragePurposeKept until
cookie-notice-dismissedLocal storageRemembers that you dismissed the cookie noticeYou clear your browser data
gh2ai_anon_calcsLocal storageCounts the calculations run on this device without an account, for the free limitYou clear your browser data
calc-tab, tea-tabSession storageRemembers which tab of the calculator or the TEA page you had openYou close the browser tab
gh2ai_ver_comoSession storageAdministrators of the platform only: which plan’s view they are previewingYou close the browser tab

Usage Analytics (Cookieless)

We use Vercel Web Analytics to understand how the platform is used — for example, which pages are visited and how visitors arrive. This analytics is cookieless: it does not store cookies or any identifier on your device, and it does not build a profile of you.

To count page views without cookies, a temporary identifier is derived from request data (including your IP address and browser information). This identifier is hashed and discarded — your IP address is not stored. The data we see is aggregated and does not identify individual users.

Legal basis: legitimate interest (Article 6(1)(f) GDPR) in understanding and improving our service. Because no cookies or device storage are involved, this does not rely on your prior consent.

CategoryPurposeLegal basis
Vercel Web AnalyticsAggregated usage measurement (cookieless — no cookies stored)Legitimate interest (Art. 6(1)(f) GDPR)

We display a brief, informative cookie notice for transparency. It is informational only — it does not gate or block analytics. Dismissing it is remembered in your browser (see Other Storage on Your Device).

How to Manage Cookies

Browser settings

All modern browsers allow you to control cookies through their settings. You can typically find these options under Settings → Privacy & Security. The following links take you directly to cookie settings for common browsers:

  • Google Chrome
  • Mozilla Firefox
  • Safari
  • Microsoft Edge

Consequences of disabling cookies

Disabling essential cookies will prevent you from logging in and using account-specific features. Our analytics are cookieless and cannot be disabled via cookie settings, as they store nothing on your device. They collect only aggregated, non-identifying usage data.

More information

For questions about our use of cookies, contact us at contact@gh2.ai. For general information about cookies, visit allaboutcookies.org.

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Project data: adapted from the IEA Hydrogen Projects Database (modified by GaugeH₂) and public records. Licence: CC BY 4.0

Calculations are estimates. Not financial advice.

The project catalogue was compiled with AI research agents, project by project, each against a public source; every field shows how it was checked.

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