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CalcStack

Privacy Policy

Last updated: March 2026

What We Collect

Return Calculator collects anonymous analytics data via PostHog to understand how our calculators are used. This includes pages visited, calculator interactions, and device type (aggregated).

We do not collect: names, email addresses, financial information, or any personally identifiable information.

Calculator Data

All calculator inputs are processed entirely in your browser. Your financial figures never leave your device.

Exception: The "Explain This Result" AI feature sends calculator inputs to our Cloudflare Worker, which proxies the request to OpenAI. We do not store these inputs.

Cookies & Storage

Return Calculator uses localStorage (not cookies) for theme preference and analytics consent dismissal.

Contact

Questions? Email privacy@craftworklabs.dev