Privacy Policy for Lumen

Last Updated: [11/23/2025]

Lumen ("the App") is a professional light and color metering application developed by Tanoo Mohal. This Privacy Policy describes how your personal information is collected, used, and shared when you use the App.

1. Information We Collect

Lumen is designed to prioritize your privacy. The App functions primarily as a standalone utility and minimizes data collection.

Camera Data

The App requires access to your device's camera to function as a light meter.

  • How it is used: Camera data (visual information) is processed in real-time on your device to calculate Exposure Value (EV), ISO, Aperture, Shutter Speed, Color Temperature (Kelvin), and Tint.

  • Storage: The App does not save, record, or transmit photos or videos. The visual data is used solely for measurement purposes and is discarded immediately after processing.

Local Settings & Preferences

The App stores your user preferences locally on your device using on-device storage (UserDefaults). This includes:

  • App Theme (Light/Dark/Clear)

  • Measurement increments (1/3 stop, 1/2 stop, etc.)

  • Last used settings (ISO, Aperture, Shutter targets)

  • Toggle states (Haptic feedback, Histogram, etc.)

2. Data Sharing and Third Parties

We do not collect, sell, or share your data.

  • No Analytics: The App does not contain third-party analytics SDKs or tracking tools.

  • No Advertising: The App does not display third-party advertisements.

  • No Server Transmission: All calculations are performed locally on your device. The App does not send your measurements or camera data to any external server.

3. Links to Other Websites

The App contains links to external websites (e.g., the developer's website, Instagram, and LinkedIn). If you click on these links, you will be directed to that site. Note that these external sites are not operated by us, and we advise you to review their specific Privacy Policies.

4. Changes to This Privacy Policy

We may update our Privacy Policy from time to time. Thus, you are advised to review this page periodically for any changes. We will notify you of any changes by posting the new Privacy Policy on this page.

5. Contact Us

If you have any questions or suggestions about this Privacy Policy, do not hesitate to contact the developer: