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Privacy Policy

Last updated · 22 July 2026
Document de référence, en anglais.

Mevona (“Mevona,” “the app,” “we,” “us,” or “our”) is an application published and operated by Marius Labs, a French simplified joint-stock company (société par actions simplifiée, SAS), registered with the Paris Trade and Companies Register (RCS Paris) under SIREN 103 186 938, with its registered office at 10 rue du Dahomey, 75011 Paris, France. Marius Labs is the data controller for the processing described here.

This Privacy Policy explains what information the app processes, how it is used, and the choices you have. It applies to the Mevona iOS app and the services it relies on (together, the “Service”).

By using the Service, you agree to the processing of information as described here. If you do not agree, please do not use the Service. Mevona is intended for adults aged 18 and over.

01

Anonymous by design

Mevona does not require an account. There is no sign-up, no email, and no login. On first launch, the app creates an anonymous identifier (a random user ID) that lets your content stay attached to your device. We do not know your name, and we do not ask for it.

Because access is anonymous, your data is tied to this anonymous identifier and to your device, not to a personal profile.

02

Information we process

Information you provide
Face photos. A front-view photo is required to generate a preview or a dossier; additional angle photos are optional. Photos are captured with the camera or selected from your photo library, with your permission.
Questionnaire responses. What brings you to the app, your age band, areas of interest, and, for the Facial Dossier, focus areas, details you add, and ethnicity information. See Section 5 for how ethnicity is handled.
Purchase information. Your subscription status (active or not), provided through Apple and our subscription management provider. We never receive your full payment card details; payments are handled by Apple.
Information collected automatically
Anonymous identifier and device data. The random user ID described above, device type, operating system, and similar technical information.
Usage and diagnostics. How the app is used (features accessed and generation events) and app error diagnostics, used to operate and improve the Service.
Push token. If you allow notifications, a token used only to tell you when a preview or dossier is ready.
03

How we use your information

We use the information above to:

Generate your Cosmetic Previews and your Facial Dossier;
Deliver, maintain, and secure the Service;
Process and validate your subscription;
Send you “Preview ready” and “Dossier ready” notifications (we do not send marketing push notifications);
Understand usage in aggregate and improve the app;
Comply with legal obligations and prevent abuse.
04

AI processing and service providers

Mevona uses artificial intelligence to produce your previews and dossier. Your photos and inputs are sent to service providers to generate your results:

Google (Gemini image generation) receives the source photo and render instructions to create the cosmetic preview you request.
Anthropic (Claude Preview API) receives questionnaire answers, selected procedures and photo metadata to prepare preview render instructions.
Anthropic (Claude Facial Dossier route) assists the human-reviewed Facial Dossier process using dossier inputs and face assets.

Mevona sends these inputs to produce the results you request. Provider-side handling is governed by the applicable provider terms and may follow retention periods different from Mevona's own storage.

Other providers that operate the Service on our behalf:

Apple — App Store distribution and payments.
Google Firebase / Google Cloud — anonymous authentication, database, file storage, backend functions, and analytics.
RevenueCat — subscription status management.

These providers process data under their applicable terms and privacy practices while providing these services.

05

Sensitive inputs and how we minimize them

Ethnicity

If you provide ethnicity information for your Facial Dossier, it is sent as part of the dossier request to improve the analysis, but it is never stored on our servers — not in our database and not in file storage. It is used to generate your dossier and then discarded server-side. Any durable copy remains only on your device.

Face photos

Face photos are personal and are treated with care. They are stored privately, scoped to your anonymous identifier, and you can delete them at any time (see Section 7). Face photos are used only to generate the previews and dossier you request. Mevona does not perform facial recognition, does not use your photos to identify you or anyone else, and does not build biometric templates such as faceprints or face-geometry maps — your photos are processed as ordinary two-dimensional images. We do not use your face photos to train AI models, and we do not use them for advertising or marketing.

06

Storage, location, and retention

Your photos, generated previews, and thumbnails are stored using Google Firebase / Google Cloud infrastructure, in storage scoped to your anonymous identifier. Backend processing runs on Google Cloud. Data is processed and stored in the United States and, for certain processing, the European Union.

We retain your face data for as long as you keep it in the app, subject to an inactivity limit: if you do not use the app for 12 months, your face photos, generated previews, and dossier files are automatically and permanently deleted from our servers. You can also delete them at any time: when you use “Delete all face data” in Settings, your photos and generated results are permanently removed immediately. Uninstalling the app does not by itself delete server-side data; use “Delete all face data” first if you want it erased immediately — otherwise it is deleted automatically after 12 months of inactivity.

Mevona does not publish a separate provider-side retention period for every AI processing route. Provider-side handling may follow retention periods different from Mevona's own storage.

07

Your rights and choices

Delete your data. “Delete all face data” in Settings permanently purges your photos and results.
Manage AI consent. Before your first photo is processed, a “Your Data & AI” screen names the providers and asks for your consent. In Settings you can review it, withdraw it to block new AI processing, and consent again later. Withdrawal does not delete existing data.
Manage your subscription. Handled in your Apple App Store account settings.
Notifications. You can turn push notifications on or off in iOS Settings.
Legal rights. Depending on where you live (for example, under the EU GDPR or the CCPA), you may have rights to access, correct, delete, or port your data, and to object to or restrict certain processing. Because we operate anonymously, we may need information that lets us locate the data tied to your device. Contact us at support@mevona.cc.
Complaints. If you are in the EU, you have the right to lodge a complaint with your local data protection authority. In France, this is the CNIL (www.cnil.fr).
08

Data sharing

We do not sell your personal information, and we do not use your face photos or dossier content for advertising or to train AI models. We share data only with the service providers listed in Section 4 to operate the Service, and where required to comply with the law or to protect the rights, safety, and security of our users and the Service.

09

Security

We use industry-standard measures, including access controls scoped to your anonymous identifier, to protect your information. No method of transmission or storage is completely secure, and we cannot guarantee absolute security.

10

Children

Mevona is intended for adults aged 18 and over. It is not directed to children, and we do not knowingly process data from anyone under 18. If you believe a minor has used the app, contact us and we will delete the associated data.

11

International users

If you use the Service from outside the United States or the European Union, your information may be transferred to and processed in those regions, which may have different data protection laws than your own. By using the Service, you consent to this transfer.

12

Changes to this policy

We may update this Privacy Policy from time to time. Material changes will be reflected by updating the “Last updated” date at the top of this page. Your continued use of the Service after changes take effect constitutes acceptance of the updated policy.

13

Contact

Mevona is published by Marius Labs (SAS), 10 rue du Dahomey, 75011 Paris, France — SIREN 103 186 938 (RCS Paris).

For any privacy question or request, contact us at support@mevona.cc.

© 2026 Mevona · Marius Labs
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