Privacy Policy

Effective Date: February 21, 2026

1. Introduction

This Privacy Policy describes how Solfeggio ("the App"), developed by Songliang Chen ("Developer", "we", "us"), handles information.

If you have any questions, you may contact us at:
📧 songliang.cheung@gmail.com

2. Information We Collect

Solfeggio does not collect, store, or share any personal information.

Specifically, we do not collect:

• Name
  
  

• Email address
  
  

• Phone number
  
  

• Location data
  
  

• Photos or files
  
  

• Device information
  
  

• Usage analytics
  
  

The App works fully offline and does not require user registration.

3. Children’s Privacy (COPPA Compliance)

Solfeggio is intended for use by children under the age of 13.

We comply with the Children’s Online Privacy Protection Act (COPPA).

Because we do not collect any personal information from users, including children, we do not:

• Request personal data
  
  

• Enable account creation
  
  

• Track user behavior
  
  

• Use analytics
  
  

• Display third-party advertisements
  
  

If you believe a child has provided personal information to us, please contact us immediately at songliang.cheung@gmail.com, and we will address the issue promptly.

4. GDPR Compliance (European Union Users)

For users located in the European Union (EU), we comply with the General Data Protection Regulation (GDPR).

Since Solfeggio does not collect or process personal data:

• No personal data is stored
  
  

• No data is shared with third parties
  
  

• No data processing occurs
  
  

Therefore, data access, correction, or deletion requests are not applicable.

5. Third-Party Links (Donations)

The App may contain a donation page that provides external links to third-party payment services such as:

• PayPal
  
  

• Satispay
  
  

If you choose to make a donation, you will be redirected to the respective third-party website or application.

We do not:

• Collect payment information
  
  

• Process transactions
  
  

• Store financial data
  
  

All payment processing is handled directly by the third-party provider according to their own privacy policies.

We encourage you to review their privacy policies before submitting any information.

6. Data Security

Because Solfeggio does not collect or store user data, there is no user data stored on our servers.

7. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. Any updates will be posted with a new effective date.

8. Contact Information

If you have any questions about this Privacy Policy, you may contact:

Songliang Chen
📧 songliang.cheung@gmail.com