Privacy policy
The calculator is designed to work with minimal data. Your recent conversions and preferences stay in your browser unless you choose to share a link.
Browser storage
We use local storage to remember your selected course and up to ten recent conversions. This data is stored on your device. You can remove it with the Clear control or your browser settings.
Shared links
Share settings are written after the URL hash. Browsers do not send URL fragments as part of the normal page request.
Analytics
We may use privacy-conscious traffic analytics to understand page performance and calculator completion. We will update this policy before adding advertising cookies or personalized advertising.
Contact
If you email us, we receive the information you include. Contact hello@swimtimecalculator.com with privacy questions.