Privacy Policy

Last updated: April 18, 2026

PolyMetronome ("we", "our", or "the app") is a metronome application developed by Fernando Javier Cuadro. This Privacy Policy explains what information we collect, how we use it, and your choices regarding your data.

1. Information We Collect

Account Information

The app automatically creates an anonymous account through Firebase Authentication to enable core functionality. No personal information is associated with this account. If you choose to link a Google account, we additionally collect your email address. Your account identifier is used to sync your settings and data across devices.

Subscription Information

When you purchase a subscription, payment processing is handled by Google Play or the Apple App Store. We use RevenueCat to manage subscription status. We do not have access to your payment details (e.g., credit card number). RevenueCat receives an anonymous app user ID and purchase receipts to verify your subscription.

Usage and Crash Data

We use Firebase Analytics and Firebase Crashlytics to collect anonymous usage statistics and crash reports. This data helps us understand how the app is used and fix issues. This includes:

• Device type and operating system version
• App version
• General usage patterns (e.g., which features are used)
• Crash logs and error reports
• Device memory usage at time of error

Cloud Sync Data

If you sign in, your app settings, metronome scores, practice logs, and subscription status are stored in Firebase Firestore to enable syncing across your devices. This data is associated with your user account.

Local Network Sync

The app includes an optional local network sync feature that allows multiple devices on the same WiFi network to synchronize metronome playback in real time. This feature uses local network discovery (UDP/TCP) and does not send any data to external servers. The WiFi-related permissions (ACCESS_WIFI_STATE, CHANGE_WIFI_MULTICAST_STATE) are used exclusively for this purpose.

2. How We Use Your Information

• To provide and maintain the app's functionality
• To sync your settings and data across devices
• To manage your subscription status
• To improve the app and fix bugs
• To understand general usage patterns

3. Third-Party Services

We use the following third-party services that may collect data:

• Firebase Authentication - for user sign-in (Privacy Policy)
• Firebase Firestore - for cloud data storage (Privacy Policy)
• Firebase Analytics - for anonymous usage analytics (Privacy Policy)
• Firebase Crashlytics - for crash reporting (Privacy Policy)
• RevenueCat - for subscription management (Privacy Policy)
• Google Play Services - for app distribution and billing (Privacy Policy)

4. Data Retention

Your account data and synced settings are retained as long as you maintain an account. Analytics and crash data are retained according to Firebase's default retention policies. You can delete your account and associated data at any time by signing out and contacting us.

5. Data Security

We use industry-standard security measures provided by Firebase and Google Cloud to protect your data. All data is transmitted over encrypted connections (HTTPS/TLS).

6. Children's Privacy

The app is not directed at children under 13. We do not knowingly collect personal information from children under 13. If you believe we have collected such information, please contact us so we can delete it.

7. Your Rights

You can:

• Use the app without signing in (no personal data collected beyond analytics)
• Sign out at any time to stop data syncing
• Request deletion of your account data by contacting us

8. Changes to This Policy

We may update this Privacy Policy from time to time. Changes will be reflected on this page with an updated date.

9. Contact Us

If you have any questions about this Privacy Policy, please contact us at:

polymetronomesupport@gmail.com