Your data, explained.

This policy covers the Margerio website and enquiries sent to its contact email address. It will be updated before the software opens to users.

Data controller

RAHMAN Mahfuzur EI, 144 bis rue de Paris, 93130 Noisy-le-Sec, France. Contact: contact@rahman-mahfuzur.com.

Browsing this website

This website’s code adds no advertising tools, audience analytics or tracking cookies. Simulation inputs are calculated in your browser; they are neither sent to the server nor retained after the page is reloaded.

The hosting platform may process technical connection data, including IP addresses and request information, to deliver and secure the website. Vercel’s own processing, retention periods and safeguards for international transfers are described in its privacy policy.

When you write to us

Your email address and message are used to respond to your enquiry, based on our legitimate interest in handling incoming enquiries or, depending on your request, pre-contractual measures. They are accessible to the publisher and the email service providers needed for this communication.

We retain correspondence for as long as needed to handle and follow up on your enquiry. If further retention is needed for a legal obligation or dispute, it is limited to that purpose. Sending a message does not automatically subscribe you to a newsletter.

Your rights

You may request access, rectification or erasure of your data and, where applicable, restriction, portability or object to its processing. Send your request to our contact email address. You may also lodge a complaint with the CNIL, the French data protection authority.

Seller accounts

This website does not connect to your Amazon account or collect seller credentials, API secrets or payment details.

Last updated: 5 October 2026.