Privacy policy

This is a courtesy translation. The Spanish version is the authoritative one and prevails in case of any discrepancy.

Summary

This site has no user accounts, forms, advertising or third-party analytics tools, and it does not use cookies. We ask for no personal data to watch the lessons. Only an anonymous count of page views is kept.

Data controller

• Controller: Juan Carlos del Río (46556019V)
• Address: Bulevar del Manzanares 2. 28701. San Sebastián de los Reyes. Madrid (Spain)
• Contact: hola@porqueasi.com

What data is processed

• If you write to us by email. The site only offers a link that opens your own email program. If you write to us, we will process your address and the content of the message solely to reply to you and, if you expressly ask for it, to tell you about new lessons. Legal basis: your consent (art. 6.1.a GDPR). You can withdraw it at any time by writing to the same address. Messages are kept for as long as the conversation lasts or until you ask to be removed.
• Technical connection data. As on any website, the hosting provider (Cloudflare, Inc. (Cloudflare Pages)) processes the IP address and technical data of each request in order to serve the pages and protect the service. The site owner does not use that data to identify visitors. Legal basis: legitimate interest in providing the service securely (art. 6.1.f GDPR).
• Page-view count. To know which lessons are viewed, the server records each page served together with the country the request comes from (and, for Spain, the autonomous community), the referring website and whether the request appears to come from an automated program. No IP address or identifier is stored, no cookies are used and one person's visits cannot be reconstructed. Detailed records are deleted after a few days; only daily totals are kept.
• Third-party resources. The lessons load two open-source libraries (KaTeX, for formulas, and GSAP, for animation) from the cdnjs content delivery network, operated by Cloudflare. In doing so, your browser sends your IP address to that service.

Minors

The site is aimed at pre-university students and their families. No data about minors is collected. If you are under 14, do not send us personal data without the consent of your parent or guardian.

Recipients and international transfers

No data is passed to third parties, unless required by law. The hosting provider may process technical data outside the European Economic Area with the safeguards provided for in the GDPR (standard contractual clauses or the EU-US Data Privacy Framework).

Your rights

You can exercise your rights of access, rectification, erasure, objection, restriction and portability by writing to hola@porqueasi.com. You can also lodge a complaint with the Spanish Data Protection Agency (www.aepd.es) or with the supervisory authority of your country.

Changes

A lessons-on-request service is planned, to be paid for with prepaid credit that can be topped up through PayPal. It is not active today and no payment data is processed. When it is activated, payments will be handled by that provider, this site will not receive card or account details, and this policy will be updated beforehand with the data that needs to be processed to keep each person's credit.

The same will be done if user accounts or a mailing list are added.

Last updated: 14 November 2026.