Privacy Policy

App: NFCalm: Low-Stim Audio Player
Effective Date: September 14, 2026

            Summary: NFCalm is built with child safety and data privacy as core priorities. The application does not collect, transmit, share, or monetize any personal information. All audio files, configurations, and NFC identifiers are stored entirely on the user's local device.
        

1. Information We Collect

NFCalm collects zero personal data.

No Personal Information: We do not collect names, email addresses, device identifiers, physical addresses, or location data.
No Analytics or Tracking: We do not include third-party analytics libraries, behavioral trackers, or crash-reporting SDKs that track individual users.
No Advertising: NFCalm contains zero advertisements. We do not integrate ad networks or marketing trackers.

2. Permissions & Local Hardware Use

NFCalm requires specific Android permissions solely to function as an offline audio player:

Near Field Communication (NFC): Used strictly to detect physical NFC tags and read their unique hardware identifiers (UID) to map them to local audio playlists. NFC data remains on the device and is never uploaded externally.
Storage & Media Access: Used exclusively to read, play, and organize parent-uploaded audio files (.mp3, .m4a) and cover images stored locally under the application directory (e.g., /nfc_kid_player/).
Foreground Service & Audio Focus: Enables low-stimulus, screen-off audio playback so the screen can stay dark while the child listens.
Local Network Access (Wi-Fi): The app runs an embedded local web server exclusively on the local network (LAN) to allow parents to manage playlists from a browser. No data is routed outside your home network.

3. Children's Privacy (COPPA & Google Play Families Policy)

NFCalm is designed for children, toddlers, and pre-readers. In compliance with the Children's Online Privacy Protection Act (COPPA), GDPR-K, and Google Play's Families Policy:

We do not knowingly collect or solicit personal information from children under the age of 13.
All administrative features and in-app upgrades are restricted behind a Google-compliant Parental Gate.
The app operates in an isolated environment without social media integration, web browsing capabilities, or public chat mechanisms.

4. Data Storage and Retention

All configurations, NFC UID mappings, and media files reside strictly within the device's internal storage. Uninstalling the application or clearing application data permanently removes all stored media and configurations from the device.

5. Changes to This Policy

We may update this Privacy Policy from time to time to reflect changes in our practices or applicable laws. Any updates will be posted directly to this web page.

6. Contact Us

If you have any questions or suggestions regarding this Privacy Policy, please contact the developer at:

Email: tongpython@gmail.com