RAILSPAN

Privacy Policy

Railspan: Bridge Builder · LJ Digital

These are the LJ Digital privacy terms, also applicable to Railspan. To request deletion of Railspan data and see the specific deletion and retention periods, visit Delete your Railspan data.

Last updated: October 18, 2026

This Privacy Policy explains how LJ Digital (Ladislav Janeček) collects, uses, shares, and protects personal information when you use our apps and games, including Mac TV for macOS.

1. Who We Are

LJ Digital (Ladislav Janeček) develops and publishes digital products, including apps for macOS, mobile apps, and games.

Contact: info@ljdigital.cz

2. Scope

This policy applies to LJ Digital apps and games, unless a specific app includes a separate privacy policy. The Mac TV section below takes precedence for Mac TV: the general references to advertising, analytics, and mobile services elsewhere on this page do not describe Mac TV.

Mac TV Screen Mirroring for macOS

Mac TV is a local-network utility. It does not require an account, include advertising, analytics, or tracking, or send your screen, audio, files, or app diagnostics to LJ Digital or an integrated external service.

Screen and audio sharing

You choose a display or window in the macOS sharing picker and can optionally include system audio. Capture starts after your action and selection. Stop streaming to end capture. Closing the app panel does not stop an ongoing stream; quitting the app does. The selected content is sent to your chosen compatible television on your local network.

Movie files

In Movie mode, you select one video with the macOS file picker. Mac TV uses read-only access and serves the original file directly to your selected TV, including its filename, size, and media data. It does not capture the screen or system audio in this mode, modify the file, or copy the whole movie into temporary storage. File access lasts until you select another file or quit. No file-access bookmark is saved for later launches.

Local data and retention

Mac TV discovers TVs using local-network device names, model descriptions, and IP addresses. Language, TV address, and playback preferences are saved locally. During screen sharing, encoded video and audio may be buffered in memory and temporary files, including HLS segments. These files are deleted during normal stream cleanup; a crash or system failure can leave temporary files for macOS to clean up.

Technical diagnostics, which can include device addresses, stream state, and library errors, stay local unless you choose to share them for support. Free-space checks, bundled-file metadata, and monotonic timers support temporary storage and stream health. Free-space and raw system-boot-time information is not transmitted to the TV or a publisher server.

Local-network security and your controls

HTTP/DLNA traffic to the TV is not encrypted. Use a trusted network. A random stream URL limits casual access but does not encrypt the content or authenticate network hardware; other devices on the network could intercept traffic. Your TV vendor governs its own software and data practices. Choose what to share carefully, as window names, screen content, and audio can contain personal information.

You can stop sharing, quit Mac TV, and revoke screen recording or local-network permissions in macOS System Settings. Saved preferences can be removed using macOS app/container management tools. For support or privacy requests, contact info@ljdigital.cz. If you contact us, we receive only the information you choose to send and use it to handle your request.

3. Information We May Collect

Information you provide directly

If you contact us (for example by email), we may receive your name, email address, and the content of your message.

Information collected automatically

Depending on the app and device configuration, our apps or integrated services may process:

4. How We Use Information

5. Advertising and Third-Party Services

Some apps may display ads using third-party advertising partners, including Google AdMob. Third-party partners may process data in accordance with their own privacy policies.

For apps directed to children or where required by law/policy, we configure ad treatment to support child and under-age audiences, including non-personalized ad behavior where applicable.

6. Children's Privacy

We design and publish apps for different audiences, including apps that may be used by children. When an app is intended for children, we apply additional protections required by applicable law and app store platform policies.

Parents or guardians can contact us at info@ljdigital.cz regarding questions about children's privacy.

7. Data Sharing

We may share information only as necessary:

8. Data Retention

We keep personal data only for as long as necessary to provide services, comply with legal obligations, resolve disputes, and enforce our agreements.

9. Data Security

We use reasonable technical and organizational safeguards to protect data. No method of transmission or storage is completely secure, so we cannot guarantee absolute security.

10. Your Rights

Depending on your location, you may have rights to request access, correction, deletion, restriction, or objection to certain data processing. To make a request, contact us at info@ljdigital.cz.

11. International Data Transfers

Our partners or service providers may process data in countries other than your own. Where required, we take steps to ensure appropriate safeguards for international transfers.

12. Changes to This Policy

We may update this Privacy Policy from time to time. We will post the updated version on this page and revise the "Last updated" date.