Privacy Policy for Zahlen Lernen

Last Updated: April 19, 2026

This Privacy Policy describes how Zahlen Lernen ("we," "our," or "the App") collects, uses, and shares information when you use our mobile application. By using the App, you agree to the collection and use of information in accordance with this policy.

1. Information Collection and Use

We do not require users to create an account or provide personal information such as names, email addresses, or phone numbers. However, to provide a high-quality educational experience, the App uses third-party services that may collect certain types of information.

A. Device and Usage Information

We use Firebase Analytics to understand how users interact with the App (e.g., levels completed, time spent, and feature usage). This data is collected via anonymous device identifiers and is used solely to improve our educational content and user experience.

B. Advertising Data

The App displays third-party advertisements via Google AdMob. To show relevant ads and measure their performance, AdMob may collect and use device identifiers (such as Apple’s IDFA or Google’s Advertising ID). You can manage your tracking preferences through your device settings or the in-app permission prompt.

C. Audio Data and Microphone Usage

The App includes a speech practice feature. To enable this, the App requires access to your device’s microphone.

• On iOS: Speech-to-text processing is handled by Apple’s native speech recognition system. Your audio data may be processed by Apple to provide and improve their services.
• On Android: We use an offline speech recognition model (Vosk), which processes your voice data locally on your device and does not send audio to any external servers. We do not store or share your voice recordings on our own servers.

D. Diagnostics (Crash and Performance Data)

We collect anonymous diagnostic information to identify bugs and improve App stability. This includes crash reports and performance metrics (e.g., app load times).

2. Third-Party Service Providers

The App uses the following third-party services that have their own Privacy Policies:

• Google Firebase
• Google AdMob
• Apple Speech Recognition (iOS)

3. Children's Privacy

Zahlen Lernen is an educational app designed for users of all ages, including children. We are committed to protecting children's privacy. We do not knowingly collect personally identifiable information from children. Our advertising partners (AdMob) are configured to comply with applicable laws (such as COPPA) regarding advertisements shown to children.

4. Data Security

We value your trust in providing us your information. We strive to use commercially acceptable means of protecting it. However, remember that no method of transmission over the internet or method of electronic storage is 100% secure.

5. Your Rights and Choices

• Permissions: You can grant or revoke microphone and tracking permissions at any time through your device settings.
• Opt-out of Tracking: You can opt-out of personalized advertising by enabling "Limit Ad Tracking" (iOS) or "Opt out of Ads Personalization" (Android) in your device settings.

6. Changes to This Privacy Policy

We may update our Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page and updating the "Last Updated" date.

7. Contact Us

If you have any questions or suggestions about our Privacy Policy, do not hesitate to contact us at:

Email: zahlenlernen@gmail.com