Privacy policy

“Zêr û ziber” app — version 1.0.0 (optional account)

Last updated: September 29, 2026.

Data controller: NAVDA, SARL au capital de 1 000 €, SIREN 938967627, 9 rue des Colonnes, 75002 Paris, email: menderes@navda.tech.

1. What the app does

Zêr û ziber lets you record, on your phone, the contributions (money, gold, gifts) received from guests at your family's weddings and the returns you gave them, then view the corresponding balances. The app can be used entirely without an account.

2. Where your lists are

All the data you enter (people's names, kinship, places, amounts, gold, gifts, events, notes, history) is stored only on your device, in the app's local database. In this version, it is not sent to any server, even if you create an account. The app contains no ads and no audience measurement or tracking tool. If you delete the app, its data is deleted with it (remember to export first).

3. Optional account

If you choose to create an account (Settings › Account):

• Data: your email address, your password (kept only in irreversibly encrypted form by the authentication service; we cannot read it), the display name if you provide it, an account identifier assigned by the server, the creation and last sign-in dates, and technical security logs (IP address, date, device or browser type) recorded by the authentication service.
• Purposes and legal basis: creating and managing your account, sending you confirmation and password reset emails, securing access (performance of the contract; legitimate interest for the security logs). The account will prepare the online backup and sharing planned for a future version; they are not active today.
• Hosting: accounts are hosted by Supabase (Supabase Inc., processor), on servers located in the European Union (Ireland). As Supabase Inc. is a US company, any access from outside the European Union for support or maintenance is governed by the European Commission's standard contractual clauses provided for in its data processing agreement.
• On your device: the sign-in session is kept in the app's storage until you sign out.
• Retention: as long as the account exists; erasure within 30 days of a deletion request.
• No sale or sharing of this data with third parties other than the host.

4. Your responsibilities

The people you record (guests, family members) are third parties: you are responsible for the use you make of this information, which falls under personal and family use. Share your exports only with the people concerned.

5. Features that send data off the device, only at your request

• Excel / PDF export: the app creates a file that you then choose to share via your phone's share sheet (messaging, email, storage…). The recipient is chosen by you.
• Import of an Excel workbook: the file you select is read on the device; it is not sent anywhere.
• “Have my list typed up” service: if you use this paid service, the app prepares an email in your email app, addressed to menderes@navda.tech, containing your phone number, your email address, your name (optional), the estimated number of people, your message and the photos or documents you have attached. Nothing is sent until you yourself tap “Send” in your email app. This data is processed by NAVDA to draw up the quote, carry out the data entry and deliver the result to you (legal basis: performance of the contract), then kept for as long as necessary for the service and for accounting obligations (3 years after delivery for invoices and related correspondence; photos and documents are deleted no later than 30 days after delivery). It is neither sold nor passed on to third parties other than the technical providers hosting the publisher's email.
• Request for another language, account deletion request: same mechanism (email prepared in your email app, sent by you).
• Voice assistant: when you tap the microphone, the app uses your phone's speech recognition service (Google or Samsung depending on the device, Apple on iPhone), which may process your voice on the device or on its publisher's servers, under its own terms. The app does not record or keep your voice: it only receives the recognized text, which is analyzed on the device. Reading aloud is done by the device's speech synthesis.
• WhatsApp: the button on the Help screen opens the WhatsApp app; the conversation is subject to WhatsApp's terms.

6. Permissions requested

Microphone and speech recognition: only when you tap the voice assistant's microphone. Photos or camera: only when you attach photos to a data entry request. Files: only to read the workbook you choose to import and to share an export. Internet access: only for the optional account. No location or contacts permission.

7. Account deletion

In the app: Settings › Account › Delete my account (a request email is prepared in your email app). Without the app: write to menderes@navda.tech from the account's address, with the subject “Suppression de compte Zêr û ziber” (account deletion). The account and the associated data (email, display name, identifier) are erased within 30 days; the lists stay on your phone as long as you do not delete the app. Detailed procedure: account deletion.

8. Your rights

For the data stored on your device, you have full control over it (editing, export, deletion in the app). For account data and the data sent as part of the data entry service or a request, you can exercise your rights of access, rectification, erasure, restriction, objection and portability by writing to menderes@navda.tech. You can lodge a complaint with the CNIL (www.cnil.fr).

9. Security

Exchanges with the account server are encrypted (HTTPS); access to the server's data is partitioned by account. Local data is protected by your phone's mechanisms (screen lock, storage encryption depending on the model). We recommend a lock code and regular backups by export.

10. Minors

The app is intended for adults who manage their family's lists; it does not collect any data from children.

11. Future changes

A future version will offer account holders an online backup of their lists, sharing with other family members and subscriptions; this policy will then be updated and presented to you before any activation.

12. Contact