Last Updated: September 2026  |  Effective Date: September 2026  |  App Version: 1.0.0

1. Introduction

This Privacy Policy describes how weltekx-dev (“we,” “us,” or “our”) handles information when you use the WeltekxCalc Android application (the “App”). We are committed to being transparent about what data we collect and how we use it.

By using the App, you agree to the collection and use of information in accordance with this policy. If you do not agree, please do not use the App.

2. Information We Collect

2.1 Calculation History

All calculation history is stored locally on your device using a SQLite database. This data is never transmitted to any server. You can clear your history at any time from the App’s History screen.

2.2 Usage Analytics

The App uses Firebase Analytics to collect anonymous, aggregated usage data such as:

  • Screen views (which screens you open)
  • Session duration
  • Device type, Android version, and country (derived from IP)
  • App version and crash events

This data cannot be used to identify you personally. It helps us understand how the App is used and where to improve.

2.3 Crash Reports

Firebase Crashlytics automatically collects crash logs and stack traces when the App encounters an error. This data includes device model, OS version, and the sequence of events leading to the crash. Crash reports are anonymous and are used solely to fix bugs.

3. What We Do Not Collect

  • No personal information — we do not collect names, email addresses, phone numbers, or any personally identifiable information.
  • No location data — the App does not access your GPS or precise location.
  • No contacts or media — the App does not access your contacts, photos, camera, microphone, or files.
  • No advertising ID — while the Firebase SDK includes the AD_ID permission, the App does not serve advertisements or use your advertising identifier for targeting.

4. How We Use Information

We use the limited data described above solely to:

  • Fix crashes and improve App stability
  • Understand aggregate usage patterns to guide development priorities
  • Ensure the App functions correctly across different devices and Android versions

5. Data Storage and Security

Calculation history is stored in a local SQLite database on your device and is never uploaded to any server. Analytics and crash data are processed by Google Firebase’s infrastructure, which adheres to industry-standard security practices. We do not operate any servers of our own.

6. Third-Party Services

Service Purpose Data Collected
Firebase Analytics Anonymous usage statistics Screen views, sessions, device info
Firebase Crashlytics Crash reporting Crash logs, device model, OS version

Google’s privacy policy governs how Firebase processes data: https://policies.google.com/privacy

7. Children’s Privacy

The App is not directed at children under the age of 13. We do not knowingly collect personal information from children. If you believe a child has provided us with personal information, please contact us and we will delete it promptly.

8. Changes to This Policy

We may update this Privacy Policy from time to time. Any changes will be reflected in the “Last Updated” date above and published on this page. Continued use of the App after changes constitutes acceptance of the updated policy.

9. Contact

If you have questions about this Privacy Policy or the App’s data practices:

  • Email: Send us an email
  • App: WeltekxCalc
  • Package: com.weltekxdev.weltekxcalc.app

We respond to inquiries within 5–10 business days.