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VoltCalcs

Privacy Policy

Last updated:

What We Collect

VoltCalcs collects minimal data. All calculator computations run entirely in your browser — we never see your inputs or results.

Google Analytics 4

We use Google Analytics 4 (GA4) to understand how visitors use our site — which pages are popular, how long people stay, and where traffic comes from. GA4 collects anonymised usage data including page views, session duration, approximate location (country/city level), device type, and browser.

How GA4 loads depends on where you are visiting from:

  • If you are visiting from the EU, UK, EEA, or Switzerland, we ask for your consent before GA4 loads or any analytics cookies are set. The consent banner blocks tracking until you choose Accept or Reject.
  • If you are visiting from California, Brazil, Colorado, Connecticut, Virginia, or Utah, GA4 loads by default and you can opt out at any time using the “Privacy Choices” link in the footer.
  • If you are visiting from other regions, GA4 loads by default. You can clear our cookies via your browser settings to stop tracking.

We detect your region from the IP address provided by our hosting provider (Vercel) so we can apply the right default. We do not store your IP for any other purpose.

Cookies and storage

We store your consent choice in your browser's local storage under the key consent-status with a value of granted or denied. This is not a cookie and is not transmitted to our servers; it lives on your device until you clear it.

If you accept analytics, GA4 sets its own cookies (managed by Google) for analytics purposes. You can change your preference at any time via the “Cookie Settings” link in the footer (opt-in regions) or the “Privacy Choices” link (opt-out regions).

Contact Form

The contact form collects: your name (optional), email (optional), message category, and message text. This data is sent via Resend (our email delivery service) to our inbox. We do not store form submissions in a database — they exist only as emails.

The form uses Cloudflare Turnstile for bot protection. Turnstile may set a cookie to verify you are human but does not track you across sites.

Rate Limiting

We use Upstash Redis to rate-limit contact form submissions (3 per IP address per hour). Your IP address is used only for rate limiting and is not stored permanently.

Third-Party Services

  • Google Analytics 4 — website analytics (regional posture above)
  • Vercel Analytics — cookieless aggregate visit counts (no consent required)
  • Cloudflare Turnstile — bot protection on forms
  • Resend — transactional email delivery
  • Upstash Redis — rate limiting
  • Vercel — website hosting

Your Rights

Under GDPR, you have the right to access, correct, or delete any personal data we hold. Since we store minimal data (only the consent cookie and any emails you send us), you can exercise these rights by emailing contact@voltcalcs.com or using the contact form.