How we protect your data.
HolidayStacks is designed with privacy at its core. The optimization engine runs entirely within your browser. We do not store, track, or collect your personal calendar data, selected dates, or vacation strategies on our servers.
We use Nager.Date as our public holiday API provider. Your selected country and region are transmitted to this API solely to fetch the relevant public holidays for your calculation.
We may use your browser's local storage to remember your country and PTO preferences so that you do not have to re-enter them on subsequent visits. This data remains on your device and is never transmitted to us.