The short version

All calculator inputs stay in your browser. We do not have a backend that stores your scenarios on the free tier. If you upgrade to Pro, we collect the minimum information required to provide a subscription (email + Stripe customer ID). We do not sell your data, ever.

1. Information we collect

From everyone: Anonymous, aggregated usage analytics (page views, button clicks, referrer) so we can improve the product. No personally identifying information is attached to these events.

From Pro subscribers: Your email address, Stripe customer ID, subscription status, and any scenarios you choose to save to your account. Payment details are handled exclusively by Stripe — we never see your card information.

From contact form submissions: Your name, email, and message content, used solely to respond to your inquiry.

2. How we use information

To provide the Service and operate your subscription
To respond to support requests
To send transactional emails (receipts, password resets, subscription updates)
To send product update emails (you can opt out at any time)
To detect and prevent abuse

3. What we do not do

Sell or rent your personal information to third parties
Run third-party advertising on the Service
Track you across the web after you leave
Look at your saved scenarios for any purpose other than rendering them back to you

4. Third-party services

We use Stripe for payment processing, OpenRouter for live model pricing (we send no user data — only public price requests), and a transactional email provider for receipts and updates. Each maintains its own privacy policy.

5. Data retention

Saved scenarios are retained as long as your account exists. After you delete your account, we purge personal data within 30 days, except where retention is legally required (e.g., billing records for tax purposes).

6. Your rights

You can request access, correction, or deletion of your personal data at any time by contacting us. EU/UK residents have additional rights under GDPR; California residents have rights under the CCPA. We honor all valid requests.

7. Cookies

We use a minimal set of first-party cookies for session management and Pro authentication. We do not use third-party tracking cookies.

8. Contact

Privacy questions or requests? Contact us.

Privacy Policy