Privacy Policy

Engineering Kit — Professional Engineering Tools | Leo Trần

1. Introduction

Engineering Kit is an engineering reference and calculation tool app for engineers, developed by Trần Thái Quốc (Leo Trần). We respect your privacy and are committed to protecting your personal data.

2. Data Collection

Engineer operates 100% offline. We do NOT collect any personal data:

No collection of names, emails, or phone numbers
No GPS location tracking
No browsing history collection
No data sent to external servers
No account system or login required

3. Local Data Storage

The app stores some data on your device to serve your experience:

Interface settings: light/dark mode, language
Favorites list: tools you have bookmarked
Calculation history: recent calculation results
Theme preference: selected interface theme

All this data stays only on your device and is not sent anywhere. You can delete it anytime by uninstalling the app.

4. No In-App Purchases

Engineering Kit is completely free. There are no in-app purchases, subscriptions, or premium tiers. All features and tools are available to everyone at no cost.

5. Third-Party Services

The app is distributed through the Apple App Store and Google Play Store. Please refer to their respective privacy policies:

6. Children's Privacy

The app does not target children under 13 years of age. We do not knowingly collect information from children.

7. Policy Changes

We may update this policy from time to time. Any changes will be posted on this page.

8. Contact

If you have questions about our privacy policy, please contact:

Trần Thái Quốc (Leo Trần)

Email: [email protected]

Last updated: June 27, 2026