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Privacy Policy

Last updated: 24 August 2026

1. Data Controller

The party responsible for data processing within the meaning of the GDPR is:

Michael Porwol

Viehhofstr. 121

42117 Wuppertal

Germany

Email: michael@lumenexamen.com

A Data Protection Officer has not been appointed, as the requirements under § 38 BDSG (fewer than 20 persons regularly involved in data processing) are not met.

2. Principle: Your Data Belongs to You

Lumen was built on the principle of "Privacy by Design". All personal data — journal entries, transgressions, resolutions, intentions, and notes — is stored on your device. There is no user account, no automatic sync between devices, and no analysis of your content by the Provider. Only if you explicitly switch on the cloud backup is a copy — already encrypted on your device — stored with us: no name, no account, and unreadable for the Provider (section 11).

3. Encryption

All personal text fields are encrypted with AES-256-GCM via the Web Crypto API. The encryption key is generated and stored locally on your device. Even with physical access to the stored data, it cannot be read without the key.

4. What Data Is Processed?

The App processes the following data exclusively on your device:

5. Legal Basis for Processing

Your data is processed on the following legal bases (Art. 6 GDPR):

6. Network Requests and International Data Transfers

The App makes the following limited, read-only network requests:

None of these requests actively transmit personal data, device identifiers, or usage information. However, your IP address is technically transmitted as part of the HTTP connection to the respective servers. Fetching data from bible.usccb.org constitutes a data transfer to the USA (a third country without an adequacy decision). This transfer is based on Art. 49(1)(b) GDPR (necessary for contract performance — provision of liturgical content). You can prevent these network requests by using the App without an internet connection; core functions remain fully available.

7. Web Analytics on the Website

The website lumenexamen.com and the Lumen app use Umami, a privacy-friendly, self-hosted web analytics tool. Umami does not collect personal data and does not use cookies. Processing is based on Art. 6(1)(f) GDPR (legitimate interest in improving the service). The following anonymous data is collected:

Umami does not store IP addresses, does not set cookies, and does not create user profiles. Analytics data is processed on the Provider's own server in Germany and is not shared with third parties. There is no cross-site tracking. Lumen does not use any advertising networks.

8. Recipients and Third Parties

The App does not transmit personal data to the Provider or third parties. As part of the connections described in Sections 6 and 7, technical connections exist to:

9. In-App Purchases and Apple

When you subscribe to MAGIS, payment is processed by Apple through your Apple ID account. The Provider does not receive any payment data, credit card information, or other financial data. Apple's privacy policies apply to payment processing.

10. Data Retention

All data stored in the App remains on your device until you delete it yourself. You alone determine the retention period. Data is deleted when you manually delete it in the App (Settings > Reset Data), uninstall the App, or delete the exported backup file.

11. Data Backup

You can export your data as an encrypted file using the export function and import it on a new device if needed. This backup file only leaves your device if you share it yourself (e.g., via AirDrop or the Files app). The Provider has no access to it. In addition, MAGIS subscribers can switch on the cloud backup. A copy of your entries is then encrypted on your device with AES-256-GCM and stored under a random identifier derived from your backup key on a server in Frankfurt am Main (Hostinger, EU). Only that random identifier, the hash of an access token and the encrypted block are stored there — no name, no email address, no user account and no access logs with IP addresses. The key never leaves your device; the Provider cannot technically decrypt the contents. The legal basis is your explicit consent (Art. 6(1)(a), Art. 9(2)(a) GDPR), given by switching the feature on and revocable at any time by deleting the backup in the app. The backup is deleted as soon as you delete it in the app, and at the latest after 800 days without access. If you lose your backup key, the Provider cannot restore the data either.

12. Data of Minors

The App is not specifically directed at persons under 16. Without the optional cloud backup, no personal data leaves device storage; with it, the data rests with the Provider only in a form he cannot decrypt. The Provider therefore does not collect or process data of minors in plain text.

13. Your Rights Under the GDPR

Since no readable personal data is transmitted to the Provider, the Provider cannot technically fulfill the usual data subject rights with respect to locally stored data — however, you have full control yourself. The same applies to the cloud backup: the Provider cannot link the encrypted block to any person and, under Art. 11 GDPR, is not obliged to obtain additional information for that purpose. You can delete or retrieve that backup yourself in the app at any time. Regardless, we inform you of your rights under the GDPR:

14. Right to Lodge a Complaint

You have the right to lodge a complaint with a data protection supervisory authority regarding the processing of your personal data (Art. 77 GDPR). The competent authority is the one at the place of your habitual residence, your place of work, or the place of the alleged infringement.

15. Automated Decision-Making

No automated decision-making or profiling within the meaning of Art. 22 GDPR takes place in the App.

16. Changes to This Privacy Policy

The Provider reserves the right to update this Privacy Policy as needed. Users will be notified within the App of any significant changes.

17. Contact

For questions about data privacy, please contact: michael@lumenexamen.com