Privacy Policy

App Name: FourierFlow

Developer: RomanticSo

Contact Email: phamtranbile@gmail.com

Effective Date: August 12, 2026

Last Updated: August 12, 2026

1. Introduction

FourierFlow is an offline Fourier Series Visualizer application developed by RomanticSo. This Privacy Policy explains how information is handled when you use the app. The application is designed to operate entirely on your device without collecting or transmitting personal information.

2. Information We Do Not Collect

FourierFlow does not collect, store, transmit, or share any personal or sensitive data. This includes:

Names, email addresses, or phone numbers
Device identifiers (IMEI, Android ID, Advertising ID)
IP addresses or network information
Location data
Usage analytics or crash reports
Financial or payment information
Waveform settings, harmonic values, or any information entered into the app

The app does not require account registration or user identification.

3. Local Processing

All calculations, waveform rendering, and harmonic visualizations are processed locally on your device. The app does not send any information to external servers.

4. Local Data Storage

The app may store basic settings such as theme preferences or recently used configuration values locally on your device. This information remains on your device and is not accessible to the developer.

5. Permissions

FourierFlow does not request sensitive Android permissions. The app does not require:

Internet access
Location access
Camera access
Microphone access
Contacts access
External storage access

All features operate completely offline.

6. Third-Party Services

FourierFlow does not use:

Advertising networks
Analytics services
Crash reporting services
Tracking SDKs
Cloud storage services
External data processors

The app operates independently without third-party integrations.

7. Children's Privacy

FourierFlow is suitable for users of all ages. Because the app does not collect personal information, it does not knowingly collect data from children or adults.

8. Data Security

All information remains on your device. The app does not transmit any data externally. Data security depends on the security of your device. We recommend keeping your device updated and protected.

9. International Data Transfers

FourierFlow does not transfer data outside your device. No international data transfers occur.

10. User Control

You have full control over your data:

You may clear app data through Android settings
You may uninstall the app at any time
Uninstalling removes all locally stored data

11. Changes to This Policy

This Privacy Policy may be updated if app functionality changes. Updates will be reflected by revising the "Last Updated" date above.

12. Contact Information

If you have questions about this Privacy Policy, contact:

Developer: RomanticSo
Email: phamtranbile@gmail.com