The short version
The numbers you enter are calculated in your browser. They are not sent to our servers. There is no account and no login.
What is stored on your device
We use your browser's local storage to remember your last inputs for each calculator, and any scenarios you save. You can delete them at any time from the Saved scenarios page or by clearing your browser data.
Share links
When you press Share, your inputs are encoded into the link itself. Anyone with the link can see those numbers, so share it only with people you trust.
Hosting and analytics
Our hosting provider may keep standard server logs such as IP address and pages visited. If you add an analytics service, update this section to describe it.
Contact
Questions: hello@example.com