Privacy Policy

For the Backglow app and backglow.jandeboer.de · As of October 12, 2026. The German version is authoritative.

In short: the Backglow app processes your screen image only on your Mac and never connects to the internet. This website sets no cookies, keeps no access logs and embeds nothing from third parties.

1. Controller

Email: contact@jandeboer.de

2. The Backglow app

With your Screen Recording permission, Backglow captures the selected display through Apple's ScreenCaptureKit. From each frame, the app calculates a few color values for the edge zones and sends only these over the USB serial connection you chose to your LED controller. Images are neither stored nor transmitted.

Settings such as LED layout, color values and the selected display are stored locally in ~/Library/Application Support/Backglow/settings.json. When you explicitly trigger it, Backglow also writes the LED layout and color values to your controller.

The app contains no analytics, advertising or crash reporting services and makes no network connections. We receive no data from the app. You can revoke the permission at any time under System Settings → Privacy & Security. To delete all app data, remove the app and the settings folder named above.

3. This website

The website is served from our server at Hetzner Online GmbH, Industriestr. 25, 91710 Gunzenhausen, Germany, in a German data center. To deliver it, the server infrastructure processes technically necessary data such as IP address, time, requested page and the HTTP request information your browser sends.

We keep no regular access logs for this website and create no visitor profiles. Request data is processed only while the request is handled. If technical data arises in the event of a fault or security incident, we use it only as long as needed to investigate and secure operations. For the infrastructure provider's own processing, see Hetzner's privacy policy.

The website uses no cookies, no local storage, no scripts, no analytics tools and no fonts or content from third parties.

4. GitHub

Source code, downloads and issues are hosted on GitHub. Only when you follow a link there does GitHub, Inc. process data under its own privacy statement. Content you post in an issue is publicly visible.

5. Contact by email

If you email us, we process your address and message to answer your request and delete them once they are no longer needed for that and no statutory retention obligations apply.

6. Legal bases

Securely delivering the website and answering general requests are based on Art. 6(1)(f) GDPR. Our legitimate interest is a functioning, secure service and communicating with you. Requests relating to a contractual relationship are based on Art. 6(1)(b) GDPR. We do not sell personal data or share it for advertising.

7. Your rights

Under the GDPR you have the right of access, rectification, erasure, restriction of processing and data portability. You can object to processing based on legitimate interests on grounds relating to your particular situation. To do so, contact contact@jandeboer.de.

You can also lodge a complaint with a data protection supervisory authority, for example the State Commissioner for Data Protection and Freedom of Information Baden-Württemberg.

8. Changes

If features or data processing change, we update this policy. The date above defines the scope described.