Privacy policy

1. Data controller

Daniel Millán Suárez. Contact: [email protected].

2. What data we process

• Values you enter in the calculators: processed only in your browser. They are never sent to or stored on our servers.
• Preferences: your chosen power supply and currency are saved in your browser's local storage. They never leave your device.
• Browsing data: our hosting and network provider (Cloudflare) processes your IP address and technical data to serve the site and protect it from attacks. Legal basis: legitimate interest (Art. 6(1)(f) GDPR).
• Feedback: if you use “Was this helpful?”, we receive your vote, the page, your approximate country and, if you write one, your comment. To prevent duplicate votes we store a one-way hash that changes daily and cannot identify you; your IP address is not stored. It is used only to improve the calculators (legitimate interest, Art. 6(1)(f) GDPR) and kept for up to 24 months. Your browser remembers that you have voted.

3. Recipients and international transfers

Cloudflare, Inc., as hosting and network provider (and for the feedback database). Transfers to the United States are covered by the EU-U.S. Data Privacy Framework and standard contractual clauses.

4. Retention

Technical logs are kept for the minimum time needed for security.

5. Your rights

You can exercise your rights of access, rectification, erasure, objection, restriction and portability, and withdraw consent at any time, by emailing [email protected]. You may also lodge a complaint with the Spanish Data Protection Agency (www.aepd.es) or with your local supervisory authority.

6. Children

The site is not directed at children under 14.

Last updated: 2026-10-21