Privacy Policy

RT Calculator

RT Calculator is an offline gamma exposure and radiographic testing utility. This policy explains what data the app does and does not collect in version 1.0.

Bundle ID: com.linxue.gammacal Version: 1.0 Effective: June 3, 2026

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Summary: RT Calculator does not collect personal data, does not track users, does not use advertising or analytics SDKs, and does not upload calculation inputs or results to developer-operated servers.

1. Data We Collect

In the current release, we do not collect personal data from the app.

  • We do not collect names, phone numbers, addresses, email addresses, account identifiers, or payment card data.
  • We do not collect gamma exposure inputs, calculation results, history records, favorite presets, settings, or recent inputs.
  • We do not collect advertising identifiers, IDFA, device identifiers for tracking, analytics profiles, or cross-app behavior data.

2. Local Processing and Storage

RT Calculator is designed for local, offline use. Exposure calculations, decay tools, barricade estimates, geometric unsharpness tools, exposure corrections, history, favorites, and settings are processed on your device.

Local app dataHistory records, favorite presets, settings, language/theme choices, and recent inputs may be stored in the app's local container.
No cloud syncThe current release does not use iCloud sync or a developer-operated backend service.

If you uninstall the app, iOS removes the app's local container data according to normal iOS behavior. You can also delete history and favorites through the app where those controls are available.

3. Permissions

The current release does not request Camera, Location, Photos, Microphone, Contacts, Notification, or similar system privacy permissions. If future features require a permission, this policy and the App Store privacy details will be updated before release.

4. Third-Party SDKs, Advertising, and Tracking

The current release does not include third-party advertising SDKs, third-party analytics SDKs, crash-reporting SDKs, payment SDKs, or tracking SDKs. RT Calculator does not use App Tracking Transparency and does not access IDFA.

5. Data Sharing

Because we do not collect app data in the current release, we do not sell, rent, share, or disclose your app data to third parties. The app does not send calculation data to developer-operated servers.

6. Professional and Safety Notice

RT Calculator is a professional reference tool for radiographic testing workflows. Calculation results are for assistance only and must be verified against approved procedures, source certificates, exposure charts, site rules, and applicable radiation safety requirements before operational use.

7. Children's Privacy

RT Calculator is intended for professional and industrial use. It is not directed to children under 13.

8. Updates to This Policy

If the app's privacy behavior changes, this page will be updated with a new effective date and the App Store privacy details will be reviewed before release.

9. Contact

For privacy questions, contact st67891@gmail.com.