Cookie and storage policy

Optional Google Analytics, when enabled on the website, loads only after you accept, in every country. The current collection status is shown in Analytics preferences below. It measures page and action identifiers, language and device information; Google can derive approximate geography and process connection metadata. Pseudonymous analytics cookies are not anonymous data. We do not send calculation values, transfer URLs, QR contents or custom user IDs to analytics. Advertising storage, personalization and Google Signals are disabled.

You can reject or withdraw analytics through “Analytics preferences” on this Privacy Policy page, linked from the footer. Refusal leaves calculations available. Your choice is stored locally for 180 days; analytics cookies, if enabled, are limited to 180 days without automatic renewal. Withdrawal stops future collection and removes these browser cookies, but does not erase data already received by Google. The existing GA4 property retains event data for two months and user data for fourteen months, with user-data retention resetting on new activity. These shared property settings have not been changed. Cross-border processing and regional requirements require review before activation. Requests created with consent before withdrawal and already queued or in transit may finish later.