Privacy Policy

Vocal Warm-Up Trainer — Last updated: June 7, 2026

1. Overview

Vocal Warm-Up Trainer ("the App") is a free Android vocal warm-up routine app developed by 강건한건강 ("we", "us"). This Privacy Policy explains how we handle information when you use the App.

2. Information We Collect

The App does not collect, store, or transmit any personal information to our servers. It is a self-contained warm-up trainer with no user accounts and no server-side communication.

Your settings (selected vocal range, custom routines, daily streak) are stored only on your device using AsyncStorage. Uninstalling the App removes all of this data.

3. Third-Party Services

The App uses the following third-party service:

• Google AdMob — for displaying advertisements. AdMob may collect device identifiers (such as Advertising ID) and usage data to serve personalized or non-personalized ads. For more information, see the Google Privacy Policy.

4. Permissions

The App requires only internet access (to load ads). The guide tones are bundled audio files played through your device speaker. The App does not use or request access to your microphone, contacts, location, camera, or storage.

5. Data Storage

All settings and progress data are stored locally on the device. There is no cloud sync, no backup, and no account system. Uninstalling the App removes all locally stored data and cached AdMob data.

6. Children's Privacy

The App is not directed at children under the age of 13. We do not knowingly collect personal information from children.

7. Health Disclaimer

The App provides general vocal warm-up exercises for self-directed practice. It is not a medical device, does not diagnose or treat any condition, and is not a substitute for professional voice training or medical advice. If you experience pain or discomfort while singing, stop and consult a qualified voice professional or healthcare provider.

8. Changes to This Policy

We may update this Privacy Policy from time to time. Any changes will be posted on this page with an updated revision date.

9. Contact Us

If you have any questions about this Privacy Policy, please contact us at: [email protected]