Privacy Policy
This Privacy Policy describes how the mobile application Lucernia ("Lucernia", "the App", "we", "us", or "our") collects, uses, and shares information about you when you use the App. Lucernia is a Bible study assistant that helps readers look up verses and explore AI-generated contextual layers (plain-language explanations, historical background, and geographic context).
Lucernia is published by Alexandre Grisey, sole proprietor, registered in France under SIREN/SIRET 83978643100024, headquartered at 7 Allées de Chartres, 33000 Bordeaux, France (the "Publisher" or "Data Controller"). The Publisher acts as the data controller for personal data processed in connection with the App under the EU General Data Protection Regulation (GDPR) and the French Data Protection Act (Loi Informatique et Libertés).
For any privacy-related question or to exercise your rights, please contact: contact@lucernia.app.
1. Information we collect
We aim to collect as little personal data as possible. Lucernia is designed so that you can use its core features without creating an account or providing identifying information.
1.1 Information you provide
- Notes and journal entries. Text you write in the in-app journal or notes feature. These are stored locally on your device and, where applicable, transmitted to our backend solely to process AI requests you initiate.
- AI questions and lookups. The Bible reference (book, chapter, verse) you select and any free-text question you submit to the AI assistant.
- Support correspondence. If you email us, we receive your email address and the content of your message.
1.2 Information collected automatically
- Device and technical data. Operating system, OS version, device model, app version, language preference, and a pseudonymous installation identifier.
- Usage data. Anonymous events such as which screens are viewed, which features are used, errors encountered, and timestamps of activity. This is used to improve the App and is not used to identify you personally.
- Subscription data. When you subscribe, our payment processor (RevenueCat) receives a pseudonymous user identifier and the subscription transaction generated by Apple or Google. We do not receive or store your payment card information.
- Push notification token. If you opt in to notifications, your device generates a push token that we use to deliver notifications such as verse-of-the-day. You can disable this at any time in your device settings.
1.3 Information we do NOT collect
- We do not collect your name, postal address, phone number, or precise location.
- We do not collect contacts, photos, microphone, or camera data.
- We do not collect your payment card details — these are processed entirely by Apple, Google, and RevenueCat.
- We do not require account creation to use the core lookup features.
2. How we use your information
We process information for the following purposes:
- Provide the service. Run Bible verse lookups, generate AI context layers, deliver answers to AI questions, and store your notes and history.
- Manage subscriptions. Verify entitlement to premium features (unlimited verse analysis, AI questions, notes, history).
- Improve the App. Diagnose crashes and bugs, understand which features are used, and prioritize improvements.
- Send notifications (only if you have opted in).
- Respond to support requests you send us by email.
- Comply with legal obligations applicable to the Publisher.
3. Legal bases for processing (GDPR)
| Purpose | Legal basis |
|---|---|
| Providing the App's core features (lookups, AI context, notes, history) | Performance of a contract (Art. 6(1)(b) GDPR) |
| Managing premium subscriptions and entitlements | Performance of a contract (Art. 6(1)(b) GDPR) |
| Anonymous analytics and crash diagnostics | Legitimate interests in operating and improving the App (Art. 6(1)(f) GDPR) |
| Push notifications | Your consent (Art. 6(1)(a) GDPR), revocable at any time |
| Responding to support emails | Legitimate interests / your consent |
| Legal compliance (tax, accounting, legal claims) | Legal obligation (Art. 6(1)(c) GDPR) |
4. Third-party services and processors
Lucernia relies on a small number of third-party providers strictly necessary to deliver the service. Each provider acts as a data processor on our behalf and is bound by its own privacy policy.
| Provider | Purpose | Data shared | Privacy policy |
|---|---|---|---|
| RevenueCat | Subscription and in-app purchase management | Pseudonymous user ID, subscription/transaction events from Apple or Google, device platform | revenuecat.com/privacy |
| Mobiqo | Anonymous product analytics | Pseudonymous installation ID, app events, app version, OS version, device model, country (derived from IP, IP not retained for identification) | getmobiqo.com/privacy-policy.html |
| Google Firebase (Cloud Functions, Storage, Cloud Messaging) | Backend hosting, AI request orchestration, push notification delivery | Bible reference selected, optional free-text AI question, pseudonymous user ID, push token (if you opt in) | firebase.google.com/support/privacy |
| OpenAI (GPT API) | Generation of AI context layers and answers to your questions | The Bible verse text and the prompt or question content needed to generate the response | privacy.openai.com |
| Apple App Store / Google Play | App distribution and payment processing | Whatever Apple or Google collects from you as account holder; billing data is handled entirely by them | apple.com/legal/privacy / policies.google.com/privacy |
We do not sell, rent, or trade your personal data to advertisers or data brokers. We do not run third-party advertising in Lucernia.
5. AI processing and content disclaimer
Lucernia uses OpenAI's GPT API to generate contextual explanations of Bible passages and to answer questions you submit. The Bible text and your question are transmitted to OpenAI through our backend in order to produce the response.
Per OpenAI's terms applicable to API customers, your inputs and the model's outputs are not used to train OpenAI's models.
Lucernia is developed by a solo developer who does not hold a theology degree or formal religious credentials. AI-generated content is provided for educational and reflective purposes only. It may contain errors, omissions, or interpretations that do not reflect any specific denomination's doctrine. The Publisher is not responsible for the substance of AI-generated content. Always consult primary sources and qualified clergy for theological guidance.
6. International data transfers
Some of our service providers (notably OpenAI, Google Firebase, RevenueCat) are based in the United States or operate global infrastructure. When personal data is transferred outside the European Economic Area, we rely on appropriate safeguards under the GDPR, including the European Commission's Standard Contractual Clauses and, where applicable, the EU-U.S. Data Privacy Framework.
7. Data retention
- Notes, history, and journal entries are kept on your device until you delete them or uninstall the App.
- AI request payloads are not persisted beyond what is necessary to compute and return the response. OpenAI may retain inputs for a limited period for abuse monitoring as described in its policy.
- Subscription records are retained by RevenueCat, Apple, and Google for the lifetime of your subscription and as required by tax and accounting law (typically up to 10 years in France).
- Anonymous analytics are retained in aggregated form for up to 24 months.
- Support emails are retained for up to 3 years after the last contact.
8. Permissions on your device
- Notifications. Optional. Used to deliver content such as verse-of-the-day or reminders. You can decline or revoke notifications at any time in your device settings without losing access to any other feature.
9. Children's privacy
Lucernia is not directed to children under 13 (or under the equivalent age of digital consent in your jurisdiction). We do not knowingly collect personal data from children. If you believe a child has provided us with personal data, please contact us so we can delete it.
10. Your rights
Depending on your jurisdiction (GDPR, French Data Protection Act, and similar laws), you may have the right to:
- Access the personal data we hold about you;
- Request correction of inaccurate data;
- Request deletion of your data ("right to be forgotten");
- Restrict or object to processing;
- Receive your data in a portable format;
- Withdraw consent at any time, for processing based on consent;
- Define directives regarding the fate of your personal data after death (Art. 85 of the French Data Protection Act);
- Lodge a complaint with the French data protection authority, the CNIL, or with your local supervisory authority.
To exercise any of these rights, contact contact@lucernia.app. We will respond within one month, in line with Article 12(3) GDPR.
11. Security
We apply industry-standard technical and organizational measures to protect your data, including HTTPS/TLS encryption in transit, restricted access to backend systems, and reliance on reputable cloud providers that maintain ISO 27001, SOC 2, or equivalent certifications. No method of transmission or storage is perfectly secure, and we cannot guarantee absolute security.
12. Changes to this policy
We may update this Privacy Policy as the App evolves or as legal requirements change. The "Last updated" date at the top of this page reflects the most recent revision. Material changes will be notified through the App or by email when appropriate. Continued use of the App after a change constitutes acceptance of the updated policy.
13. Contact
Alexandre Grisey
7 Allées de Chartres, 33000 Bordeaux, France
SIRET: 83978643100024
Email: contact@lucernia.app
