Legal notice · v 1

Legal
notice.

Publisher identity, hosting provider, terms of use and intellectual property for the 21day.io site.

Last updated · April 2026This page contains markers in brackets [..] to be filled before official publication.

§ 01Publisher

01 · who's responsible

The 21day.io site is published by 21Day Studio, [TO COMPLETE before official publication: legal form, share capital, RCS, SIREN, full address of registered office].

Publication director: Maxence Foulon

Intra-community VAT number: [TO COMPLETE: FR + number] — VAT applied or basic franchise depending on regime.

General contact: contact@21day.io

§ 02Hosting

02 · where the site runs

The site is hosted by Vercel Inc., 440 N Barranca Ave #4133, Covina, CA 91723, USA. The self-hosted CRM runs on Hetzner Online GmbH, Industriestr. 25, 91710 Gunzenhausen, Germany (EU region).

Vercel host contact: https://vercel.com/contact · Hetzner contact: info@hetzner.com

§ 03Intellectual property

03 · rights and licenses

All content on the 21day.io site (text, images, illustrations, trademarks, logos, design system, source code) is the exclusive property of 21Day Studio or used under license.

Any reproduction, representation, modification, publication or adaptation of the site's elements, by any means, is forbidden without prior written authorisation.

§ 04Personal data

04 · your data

Personal data processing is detailed in the privacy policy. You'll find purposes, retention periods, subprocessors and the procedure to exercise your GDPR rights.

§ 05Cookies

05 · what we store

21day.io only uses cookies strictly necessary for operation, exempt from consent collection under article 82 of the French Data Protection Act. Cookies set: 'client_session' (signed JWT, 14-day TTL, purpose: client portal authentication, HttpOnly + SameSite=Lax + Secure in prod) and 'pending_client_number' (UX, deleted after authentication). No advertising cookies, no third-party tracking.

If we activate an audience analytics tool, it will be explicitly disclosed and anonymous by default (Plausible, Pirsch or sovereign equivalent), with prior consent if necessary.

§ 06Applicable law

06 · jurisdiction

This site and its use are governed by French law. Any dispute falls under the exclusive jurisdiction of the French courts [TO COMPLETE: specify the jurisdiction matching the city of the registered office].