Privacy Policy

What We Collect

Email addresses — only when you voluntarily provide them (e.g., to download a report or subscribe to PRO). We never require an email to use free tools.

Page views — we track which tool pages are visited (path and timestamp) for analytics. No personal data is attached to page views.

No tracking cookies — we do not use cookies for tracking. Google Analytics (GA4) may use its own cookies per Google's privacy policy.

Your Data Stays in Your Browser

Most tools run entirely client-side. Your production data, well parameters, and calculation inputs are processed in your browser and never sent to our servers. For tools that require server-side computation (e.g., decline curve fitting), data is processed in memory and immediately discarded — never stored.

How We Use Your Email

• To send you the report or resource you requested
• To notify you of new tools (you can unsubscribe anytime)
• PRO subscribers: to provide engineering support

We never sell, rent, or share your email with third parties.

Third-Party Services

• Google Analytics (GA4) — anonymous usage analytics
• Stripe — payment processing for PRO subscriptions (we never see your card number)
• Railway — hosting infrastructure (US-West)

Data Retention

Email addresses are retained until you request deletion. Page view analytics are retained for 12 months. PRO subscription data is retained as required by tax/accounting regulations.

Your Rights

You can request deletion of your data at any time by emailing info@petropt.com. We will respond within 30 days.

Contact

Groundwork Analytics LLC
Email: info@petropt.com
Website: petropt.com