Privacy

Last updated: 6 October 2026.

Controller and contact

Alejandro del Alamo, Calle Nuñez de Balboa, Colmenar Viejo, Madrid, Spain. Contact alejandro-alamo@hotmail.com for privacy questions or requests.

Calculator inputs

Calculations run locally in your browser. NumberSwift does not send or store the numbers you enter. Sharing a calculation explicitly places those values in the link, so share only information you intend others to see. New share links put inputs after the # fragment, which is not sent in HTTP requests. Older links with query parameters can appear in hosting logs.

Your theme preference is stored locally. We use Google’s consent manager, delivered through the AdSense script, to collect and remember privacy choices. Google Analytics measures visits and calculator interactions only after analytics consent. Ad placements are currently disabled. A hosting provider may process standard access logs, including IP addresses, to deliver and protect the service.

Email correspondence and hosting

If you email us, the operator and email provider process the information you send to answer your request. We keep correspondence only as long as needed to address the request or meet legal obligations. Hosting is provided by Vercel and may involve processing outside your country. Responding to correspondence and keeping the service secure rely on our legitimate interests. We do not use correspondence for marketing. If applicable, we use the safeguards described by our providers for international transfers. Its privacy information is available at Vercel Privacy Policy.

Google consent and advertising

Google receives technical information, such as your IP address, browser information and page address, when its consent and AdSense scripts load. Its consent manager stores your choices and presents the applicable purposes, partners and legal bases. Optional advertising storage and personalisation require your consent where applicable. You can refuse consent or manage individual choices in the message, and reopen it using “Privacy and cookie settings” in the footer. Withdrawing consent does not affect processing that occurred before withdrawal.

Google and its partners may process data outside your country under their applicable safeguards. See how Google uses information from sites that use its services and our cookies information. Calculator inputs are not deliberately passed to these services; avoid sharing sensitive values in public links.

Audience analytics

With your consent, Google Analytics receives page views and tool interaction events to help us improve NumberSwift. We exclude calculator values, search terms, URL query parameters and fragments from these events. Google processes technical information such as your IP address and browser information. Analytics cookies expire after 180 days; advertising personalisation and Google signals are disabled in our configuration. You can refuse analytics or withdraw consent through “Analytics settings” in the footer, which stops our analytics collection and clears our Analytics cookies. Google may process information internationally as described in its privacy information linked above.

Your rights

You can contact the operator to request access, correction, deletion, restriction or portability of your personal data, or to object to processing, where applicable. You may lodge a complaint with the Spanish Data Protection Agency at aepd.es.