Privacy Policy — Diagonal Calculator App

Last updated: October 12, 2025

Thank you for using Diagonal Calculator, developed by LengerApps. This Privacy Policy explains how we collect, use, disclose, and protect information when you use our mobile application.

1. Information We Collect

Diagonal Calculator does not collect personal data such as your name, email, or contact details. However, to provide functionality and improve user experience, the app may use third-party services that collect limited non-personal dаta:

• Device identifiers: such as Advertising ID, device model, OS version — used for personalized ads via Google AdMob.
• Anonymous analytics: usage data (e.g., feature interactions, session frequency) via Google Analytics for Firebase (if enabled).

All collected data is anonymized and cannot be used to identify you personally.

2. How We Use the Data

The collected information is used solely to:

• Enable core app functionality (e.g., triangle diagonal and area calculation);
• Display personalized ads through Google AdMob;
• Analyze app performance and user experience (if analytics is enabled);
• Comply with legal obligations.

3. Data Sharing

We do not sell or share your data with third parties except for trusted service providers:

• Google AdMob — for ad delivery. Learn more: Google Privacy Policy.
• Google Analytics for Firebase — for anonymous usage analytics. Learn more: Google Privacy Policy.

4. Data Security & Storage

All data is processed and stored within Google’s secure infrastructure (AdMob, Firebase). We do not store any user data on our own servers. While we implement reasonable security measures, no internet transmission is 100% secure.

5. Your Rights

Depending on your location (e.g., under GDPR in the EU or CCPA in California), you have the right to:

• Opt out of personalized advertising via your device settings (reset or limit Advertising ID);
• Request information about data collected (note: we do not store personal data directly);
• Delete or reset identifiers through your Android settings.

6. Changes to This Policy

We may update this Privacy Policy from time to time. The latest version will always be posted here with an updated “Last updated” date.

7. Contact Us

If you have any questions or concerns, please feel free to reach out:

WhatsApp: +7 771 564 2411
Email: dev.lenger@gmail.com
Developer: LengerApps

Thank you for trusting Diagonal Calculator!