RusLex — Privacy Policy

👤 1. Developer Information

App Name: RusLex — Russian Language Trainer

Developer: Hayder

Contact Email: ruslexapp@gmail.com

Platform: Android (Google Play Store)

App Package: com.hayder.aiassistant.russianpronunciationtrainer

📊 2. Data We Collect & How We Use It

RusLex is designed with privacy in mind. We minimize data collection to only what is necessary for the app to function.

🔗 3. Third-Party Services & SDKs

RusLex integrates the following third-party services. Each may collect data according to their own privacy policies:

a) Google AdMob (Advertising)

We use Google AdMob to display optional rewarded advertisements. AdMob may collect:

• Advertising ID (device identifier for ad personalization)
• IP address (approximate location for ad targeting)
• Device information (model, OS version, screen size)
• Ad interaction data (impressions, clicks)

AdMob's data practices are governed by Google's Privacy Policy and How Google Uses Data When You Use Our Partners' Apps.

b) Google User Messaging Platform (UMP / GDPR Consent)

We use Google's UMP SDK to collect and manage advertising consent from users in regions that require it (EU/EEA, UK). This ensures compliance with GDPR and ePrivacy regulations before any personalized ads are served.

c) Google ML Kit (Translation)

We use ML Kit's on-device translation API to provide real-time translations. All translation processing happens locally on your device; no text is sent to external servers for translation.

d) Android Speech Recognition

The app uses the device's built-in speech recognition engine for pronunciation practice. Audio is processed by the device's local speech recognizer and is never recorded, stored, or transmitted by RusLex.

🔐 4. App Permissions & Justification

RusLex requests only the permissions strictly necessary for its features:

🛡️ 5. Data Storage & Security

RusLex stores all user-generated data locally on your device:

• Language database: Stored in a local SQLite database on your device
• Learning progress (SRS cards, streaks, reviews): Stored locally; never uploaded to any server
• App preferences (language, notification settings): Stored in local SharedPreferences

We do not operate any server or cloud storage. The only network communication from RusLex is:

• Outgoing ad requests to Google AdMob servers
• Periodic checks for language database updates from a secure endpoint

All network communication is encrypted using HTTPS/TLS.

🗑️ 6. Data Retention & Deletion

Since RusLex does not create accounts or store data on servers, data retention is fully under your control:

• To delete all app data: Go to Android Settings → Apps → RusLex → Storage → Clear Data
• To uninstall: Uninstalling the app automatically removes all locally stored data
• To reset Advertising ID: Go to Android Settings → Privacy → Ads → Reset advertising ID or delete it entirely
• To opt out of personalized ads: Go to Android Settings → Privacy → Ads → Opt out of Ads Personalization

For data collected by Google AdMob, please refer to Google's data retention policies.

🤖 7. AI-Generated Content Disclaimer

RusLex uses Artificial Intelligence technology to generate translations, linguistic explanations, and educational content displayed within the app. While we strive for accuracy:

• AI-generated translations and explanations may contain inaccuracies or errors
• Content is provided "as is" for educational purposes only and should not be considered a substitute for professional language instruction
• Users are encouraged to verify critical translations with qualified human translators

This disclaimer is also displayed within the app interface.

📚 8. Data Sources

Our vocabulary and linguistic database is built using processed data from Russian Wikipedia dumps, which are publicly available under the Creative Commons Attribution-ShareAlike License. This data has been processed and adapted to provide a comprehensive Russian language learning experience.

👶 9. Children's Privacy

RusLex is not directed at children under the age of 13 (or the applicable age of digital consent in your jurisdiction).

• We do not knowingly collect personal information from children
• The app does not participate in Google Play's "Designed for Families" program
• Advertisements shown through AdMob are not targeted at children

If you believe a child has provided us with personal data, please contact us and we will take steps to address the issue promptly.

⚖️ 10. Your Rights

You have full control over your data in RusLex:

• Right to Access: All your learning data is stored locally on your device and is directly accessible to you
• Right to Deletion: You can delete all data at any time by clearing app data or uninstalling
• Right to Opt Out of Ads: You can disable personalized ads through your device's settings
• Right to Notification Control: You can disable all notifications from the app's settings or Android notification settings
• Right to Microphone Control: You can revoke microphone permission at any time through Android settings; the app will continue to function without pronunciation features

🌍 11. International Users (GDPR / CCPA)

For users in the European Union / EEA / UK (GDPR):

• We use Google's UMP SDK to obtain your consent before serving personalized ads
• You may withdraw consent at any time through the consent dialog or device settings
• The legal basis for ad-related data processing is your consent (Article 6(1)(a) GDPR)
• Google Ireland Limited acts as the data controller for AdMob data in the EEA

For users in California (CCPA):

• RusLex does not sell personal information
• You have the right to know what data is collected and to request deletion
• The Advertising ID shared with Google AdMob may be considered "selling" under CCPA — you can opt out via device settings

📝 12. Changes to This Policy

We may update this Privacy Policy from time to time. When we do:

• The "Effective Date" at the top of this page will be updated
• Material changes will be communicated through a notice within the app
• Continued use of the app after changes constitutes acceptance of the updated policy

📧 13. Contact Us

If you have any questions, concerns, or requests regarding this Privacy Policy or your data, please contact us: