Privacy

There's no account, sign-up or email request. Your measurements, project areas, prices and notes are stored only in your browser's local storage on your device. They aren't sent to us.

Because the data lives in your browser, clearing your browsing data, using private browsing or switching devices will remove or hide your saved project. Use Download CSV or Print on the shopping list to keep a copy.

This site doesn't include advertising or tracking scripts. Our hosting provider may keep standard server logs, such as IP address and pages requested, for security and reliability.

You can delete your saved project at any time with Clear project on the shopping list page.

Feedback messages

If you use the Feedback button, we receive the reason you chose, your message, the page you sent it from and, only if you enter one, your email address. We use this only to fix problems, improve the calculators and reply to you. Messages are stored privately with our hosting provider, Lovable Cloud, and only the site owner can read them. They are never shown publicly or sold.

To prevent spam, we keep a one-way coded marker derived from your IP address for up to one hour. It cannot be turned back into your IP address and is deleted automatically. Feedback messages are deleted automatically after 12 months, or sooner when no longer needed.