Privacy

No accounts, no database. Every calculator runs in your browser. We don't ask for your name or email.

What is stored on your device

To save you retyping, the calculators remember your last inputs, and the fuel log keeps your fill-ups, in your browser's localStorage (keys starting with fcp:). This data never leaves your device unless you export it. Clearing your browser data removes it, or use the button below.

The AI assistant

If you press an "Ask" or "Analyse" button, the question and the calculator figures shown with it (or your fuel log, for the log analysis) are sent to our server and passed to an AI model through Vercel AI Gateway to generate the answer. We don't store these requests. Don't include personal details in your question. Requests are rate-limited by IP address, held briefly in memory only.

Analytics

We use Ahrefs Web Analytics to count page views. It is cookieless and doesn't build a profile of you.

Contact

Questions about this policy can be raised through the site owner's GitHub (llmpreneur).