Privacy Policy for Lumina PDF Studio

Last updated: September 20, 2026

Lumina PDF Studio ("we", "our", or "us") is committed to protecting your privacy. This Privacy Policy explains how the Lumina PDF Studio mobile application (the "App") handles your information. Lumina PDF Studio has no account system and no backend servers of our own. Your documents stay on your device.

1. On-device processing

All core functionality, including scanning, PDF creation and editing, OCR (text recognition), watermarking, redaction, e-signing, format conversion, and the encrypted Private Vault, runs locally on your device. We do not upload, collect, transmit, or store your documents, scans, or their contents on any server operated by us.

2. Information we do not collect

We do not collect:

• Your name, email address, phone number, or other contact details.
• The content of your documents, photos, or files.
• Analytics, advertising identifiers, usage metrics, or location data.

Lumina PDF Studio contains no advertising SDKs and no third-party analytics SDKs.

3. Device permissions

Lumina PDF Studio requests permissions only for features you actively use:

• Camera: used solely to scan physical documents into PDFs. We do not record video or capture images in the background.
• Storage / Files & Media / Photos: used to open documents you choose, and to save the PDFs and images you create, edit, or export.

4. Third-party components

Although your documents never leave your device, the App includes the following third-party components, which may communicate with their providers:

• Google ML Kit (on-device text recognition and entity extraction). Text recognition runs on your device. To enable it, ML Kit may download processing models from Google Play Services on first use. The text and documents being analyzed are not sent to Google.
• Google Fonts (typography). The App may download and cache font files from Google's servers. This may expose your device's IP address to Google as part of a standard network request. No document content is involved.

These components are governed by Google's own privacy policies.

5. App store / distribution

Lumina PDF Studio is free to download from the Google Play Store (and, where applicable, the Apple App Store). It offers a single optional one-time in-app purchase that unlocks the professional tools and removes the “Made with Lumina PDF Studio” mark from documents you save after editing. There is no subscription.

The store handles the purchase, the payment and the record of what you own, under its own privacy policy. We never see your payment details. No card numbers, no billing address, no name. The App asks the store one question, “has this device’s account bought the unlock?”, and stores only the yes or no answer on your device. That answer is what lets your purchase survive a reinstall or a new phone.

6. Security & the Private Vault

The Private Vault encrypts files locally using AES-256-GCM. The encryption key is stored in your device's hardware-backed secure storage (Android Keystore). Your Vault and App-Lock PINs are stored only as salted hashes, never in plain text.

Because your data is never backed up to our servers, you are responsible for keeping your own backups of important documents before changing devices or uninstalling the App. No method of electronic storage is 100% secure.

7. Children's privacy

Lumina PDF Studio is not directed at children under 13 and does not knowingly collect personal information from anyone. Given the on-device architecture, we do not collect personal information from any user, regardless of age.

8. Changes to this policy

We may update this Privacy Policy from time to time. Changes will be posted on this page with an updated "Last updated" date. Please review it periodically.