Privacy Policy

Effective Date: April 19, 2026

NDT Master (Bundle ID: com.linxue.ndtmaster)

Privacy by design: NDT Master is offline-first. Core UT calculations, 3D visualization, and OCR recognition run locally on your device. We do not build user profiles, do not run ad tracking, and do not upload your inspection data to our servers.

1. Data We Collect

We do not collect personal data in the current release. This includes:

Personal identifiers (name, phone number, physical address).
Inspection inputs, OCR results, calculator outputs, history records, and custom materials.
Advertising identifiers, cross-app tracking identifiers, or behavior analytics for profiling.

The app's current privacy behavior is aligned with "Data Not Collected" in App Store privacy labeling.

2. Local Processing and Storage

All core functions are processed on-device.

UT calculations and 3D beam simulation run locally.
OCR text recognition is performed locally via iOS frameworks.
Settings, calculation history, and custom material data are stored in app-local storage.
No account registration is required.
If you uninstall the app, local app container data is removed by iOS.

3. Permissions

NDT Master requests only the permissions required for user-triggered features:

Camera: required only when you use OCR scanning.

4. Purchases and Apple Services

Subscription purchase, billing, and restoration are handled by Apple through the App Store. We do not receive your payment card details.

5. Third-Party SDKs and Tracking

The current release does not include third-party advertising SDKs, third-party analytics SDKs, or custom tracking SDKs.

6. Children's Privacy

NDT Master is a professional engineering tool and is not directed to children under 13.

7. Policy Updates

If privacy behavior changes in future releases, this page will be updated with a new effective date.

8. Contact

Email: st67891@gmail.com