Privacy Policy

1. Overview

Yalintech ("we", "us", or "our") is committed to protecting your privacy. This Privacy Policy explains how our sensor & audio apps collect, use, and protect your information.

Key principle: Our apps are designed to work primarily on your device. We minimize data collection and do not sell your personal information.

2. Data We Collect

Our sensor & audio apps may access the following types of data:

• Microphone audio levels (Sound Meter) — processed locally on your device
• Audio recordings (Sound Recorder) — processed locally on your device
• Magnetometer readings (Metal Detector) — processed locally on your device
• Device sensor data (accelerometer, gyroscope) — processed locally on your device
• Battery and device status — processed locally on your device

What we don't collect: We do not collect personal identification information, location data (unless specifically required for app functionality), browsing history, or contacts.

3. How We Use Your Data

Data accessed by our apps is used solely to provide the app's core functionality:

• To perform the specific function you requested (scanning, reading, measuring, etc.)
• To save your preferences and history locally on your device
• To improve app performance through anonymous, aggregated analytics

We do not: Sell your data, share it with third parties for marketing, or use it for purposes beyond the app's stated functionality.

4. App Permissions

These apps may request the following permissions:

• Microphone (Sound Meter and Recorder)
• Magnetometer (Metal Detector)
• Storage (for recordings)

Permissions are requested only when needed for core functionality. You can revoke permissions at any time in your device settings, though this may limit app functionality.

5. Third-Party Services

Our apps may use the following third-party services:

• Google AdMob — For displaying advertisements (free versions). AdMob may collect device identifiers for ad personalization. Google Privacy Policy
• Firebase Analytics — For anonymous usage statistics including screen views, user engagement, and app performance. Firebase Privacy
• Firebase Crashlytics — For crash reporting and error logging to improve app stability. Collects device state, crash stack traces, and app version information.
• App Store / Google Play — For in-app purchases and app distribution. Purchase data is handled by Apple/Google respectively.

Premium/paid versions of our apps typically have reduced or no advertising.

6. Data Security

We implement appropriate security measures to protect your information:

• Data is stored locally on your device using standard OS security mechanisms
• We do not transmit sensitive data to external servers
• Any network communications use encrypted connections (HTTPS)

7. Children's Privacy

Our apps are not directed to children under 13. We do not knowingly collect personal information from children. If you believe we have inadvertently collected such information, please contact us and we will promptly delete it.

8. Your Rights

Depending on your jurisdiction, you may have the following rights:

• Access — Request information about data we hold about you
• Deletion — Request deletion of your data (most data is local and can be deleted by uninstalling the app)
• Opt-out — Disable personalized advertising in your device settings
• Portability — Export your data where the app provides export functionality

To exercise these rights, contact us at the email below.

9. Changes to This Policy

We may update this Privacy Policy from time to time. Changes will be posted on this page with an updated revision date. Continued use of the app after changes constitutes acceptance of the updated policy.

10. Contact Us

If you have questions about this Privacy Policy or our data practices, please contact us: