Privacy

Last updated 17 October 2026.

The short version

This website doesn't use cookies, analytics or advertising trackers, and doesn't load third-party scripts or fonts. The free calculators run entirely in your browser: nothing you type is sent anywhere.

Hosting

The site is hosted on GitHub Pages. Like any web host, GitHub may log technical information such as your IP address to keep the service secure. See the GitHub privacy statement.

When you buy

Checkout is run by Lemon Squeezy. They collect your name, email, payment and billing details to process the order; see the Lemon Squeezy privacy policy. We receive order details (such as your name, email, country and what you bought) so we can deliver your files and help with support or refunds. We never see your full card details.

When you email us

We keep your emails so we can reply and help later if needed.

What we don't do

We don't sell or rent your information, and we don't add you to a mailing list without your permission.

Your choices

To see or delete the information we hold about you, email nisal2004dissanayake7@gmail.com.

The spreadsheets themselves

The files you buy are yours. Whatever you type into them stays on your computer, or in your own Google Drive if you use Google Sheets. It isn't sent to us.