Privacy Policy

What we collect

• Account information. If you create an account, we store your name, email address, and a securely hashed password. We never store your password in plain text.
• Contact form submissions. If you use our contact form, we store the name, email, and message you provide, along with your IP address and browser user agent, so we can respond and guard against abuse.
• Payment information. Paid subscriptions are processed by Stripe. We do not store your card details ourselves — Stripe handles that directly, per Stripe's own privacy policy.
• Usage data. Like most websites, we use Google Analytics to understand aggregate traffic patterns (which pages are popular, how people navigate the site). This is not tied to your name or email unless you're signed in.
• Cookies. Signed-in pages (like your dashboard) use a session cookie to keep you logged in. Most of the site — every calculator, table, and reference page — sets no cookie at all and works the same whether or not you have an account.

Advertising

We show ads served by Google AdSense to keep the free tools free. Google may use cookies or similar technology to serve ads based on your prior visits to this or other websites. You can opt out of personalized advertising through Google's Ads Settings.

API and MCP access

If you use our API or MCP server with a personal access token, we log token usage (call counts, timestamps) to enforce rate limits and subscription plan usage — not the content of your requests beyond what's needed to serve them.

How we use your data

We use the information above to operate the site, respond to you, process payments, prevent abuse, and understand how the site is used so we can improve it. We do not sell your personal data.

Your choices

You can request deletion of your account and associated data, or ask what data we hold about you, by contacting us.

Changes to this policy

We may update this policy as the site changes. Material changes will be reflected by updating the "Last updated" date above.

Contact

Questions about this policy? Get in touch.