Privacy notice.

Halvern, a sole proprietorship (eenmanszaak) of Quinten Neumann in the Netherlands, registered with the Chamber of Commerce under number 42154000. Our full business details are on the legal page. Questions about this notice go to halvern.studios@outlook.com.

This website runs on WordPress and is hosted by mijn.host, a Dutch hosting company. To deliver pages and keep the site secure, the server processes your IP address, the page you request, the time of the request and information about your browser. The host keeps these access and security logs for at most 12 months. Security software on the site, a firewall and a login protection tool, uses the same information to block attacks.

Visitors get no cookies, and nothing is written to your browser’s storage by this site. No analytics, advertising or other tracking scripts are loaded. Fonts, images and films are served from this site itself. The only other services involved are Cal.com and Daan, in the situations described below.

The form on the contact page only composes a message inside your own email app; nothing is submitted to or stored by this website. Email is handled in Halvern’s Outlook.com mailbox, provided by Microsoft.

You can also call us or send a WhatsApp message. WhatsApp is provided by Meta, which processes those messages under its own terms.

We use what you send us to answer you and, if a project follows, for that project.

“Book a conversation” opens Halvern’s calendar from Cal.com inside a window on this site (a frame from app.cal.com). The calendar loads when you show booking intent: when you hover over, focus, touch or click a booking button. On the contact page it is also prepared in the background shortly after the page has loaded, so that it is ready when you click, unless your browser signals a data-saving preference or a slow connection.

Loading the calendar means your browser downloads Cal.com’s booking application and connects to Cal.com’s servers and to the error-reporting service Cal.com uses. Cal.com receives connection information at that moment, and later the details you enter to book, under Cal.com’s privacy notice. Cal.com may use its own storage inside its frame. It handles your booking and invitation, and confirmed bookings appear in Halvern’s Outlook calendar. When you book through Daan, this page receives the appointment time and status from Cal.com to display a confirmation. That receipt stays in your browser tab and is not sent to the AI provider.

When you send a message to Daan, your question and recent chat replies are sent through this website’s server to Google Gemini, which writes an answer from Halvern’s approved information under Google’s privacy terms. If you ask to book, the server also checks public availability with Cal.com. Enter your name, email and project notes in Cal.com’s booking form, not in the chat.

The chat server does not save conversations or audio. Chat history stays in the page until you leave or reload it. To limit abuse and control usage, the service keeps request and budget counters in Supabase (stored in Frankfurt, Germany), including keyed identifiers derived from IP addresses. These counters contain no chat messages, expire at the end of the period they count (at most one month) and are then deleted.

Please do not share personal details you would not want processed this way; Daan only needs your question.

Our prototypes, such as Stillform, Verdant and MÈCHE, run on their own addresses. Nothing you do there is sold, paid for or booked. The MÈCHE demo stores what you enter in its appointment form as a pending demo request, so please use sample details. We delete a demo request when you ask us to.

• If you personally ask us for a proposal or hire us, we use the necessary details to prepare and carry out that agreement (GDPR article 6(1)(b)).
• If you contact us on behalf of an organisation, we use your business contact details because we have a legitimate interest in answering relevant enquiries and managing the relationship (article 6(1)(f)).
• We keep invoices and accounting records because Dutch tax law requires it (article 6(1)(c)).
• We use server logs, security tools and Daan’s counters to protect the site and its users, which is our legitimate interest (article 6(1)(f)).

We don’t use your data for marketing, we don’t sell it, and we don’t make decisions about you by automated means alone.

• Enquiries, messages and booked conversations that do not lead to a project: deleted within 12 months of our last contact.
• Project correspondence and files: for as long as the project and any maintenance plan run.
• Invoices and accounting records: seven years, as Dutch law requires.
• Server access and security logs: at most 12 months, by the host.
• Daan’s usage counters: at most one month.

If a dispute or legal obligation requires it, we may keep the relevant records longer, with access restricted.

The services named above, mijn.host, Microsoft, Meta, Cal.com, Google and Supabase, process data for us or under their own terms. Some of them can process data outside the European Economic Area; their privacy notices describe the safeguards they use. We don’t send enquiry details to any other AI service.

You can ask what personal data Halvern holds about you and ask us to correct it, delete it or limit how we use it. You can object to use based on our legitimate interest, and where the legal conditions are met you can receive your data in a portable format. Some records, such as invoices, we must keep by law.

Email halvern.studios@outlook.com. We may ask for information to confirm it is you, and we respond within one month. You can also complain to the Dutch supervisory authority, the Autoriteit Persoonsgegevens.