Theme preference
The light or dark theme choice is stored in local storage so this browser can remember it on later visits. It does not contain your calculator equipment list.
Calculator session
Session storage keeps your equipment and assumptions as you move between pages or reload the current tab. It is separate from a permanent customer account. Closing the tab normally ends the session, although a browser session-restore feature may restore it. Use Restart when you want to clear the working list now.
Hosting and external sites
This website code adds no advertising pixels or analytics scripts. The hosting platform may use its own authentication or technical mechanisms. External WhatsApp and AI services have their own storage and privacy practices. If browser storage is blocked, the calculator can still work on the open page but cannot promise restoration.
