How Your Data is Stored

🖥️ Local Storage (Browser)

  • Messages and conversations
  • Account settings and preferences
  • Audio recordings and voice data
  • AI instructions and training corpus
  • Speech synthesis settings

☁️ External Services

  • ElevenLabs: Text for voice synthesis
  • Google Gemini: Text/audio for AI features
  • Supabase: Data for authenticated users

1. Introduction

September ("we," "our," or "us") is committed to protecting your privacy. This Privacy Policy explains how we collect, use, and safeguard your information when you use our communication assistant application designed for people living with ALS, MND, and other neurodegenerative conditions.

2. Information We Collect

2.1 Information Stored Locally

September uses a local-first approach for unauthenticated users. The following data is stored in your browser's local storage:

  • Account Information: Name, location, medical diagnosis details, and onboarding preferences
  • Messages: All conversations, text content, and message metadata
  • Audio Data: Speech recordings, voice synthesis settings, and audio alignment data
  • AI Settings: Custom instructions, training corpus, and API keys you provide
  • Speech Preferences: Voice selection, speed, pitch, and other TTS settings
  • Documents: Any text documents you create or upload

2.2 Information Sent to External Services

To provide AI-powered features, we share specific data with external service providers:

ElevenLabs (Voice Synthesis)

  • Text content you want to convert to speech
  • Voice settings (speed, stability, similarity)
  • Your ElevenLabs API key (if provided)

Google Gemini AI

  • Text for generating conversation suggestions
  • Previous message context for better predictions
  • Audio files for speech-to-text transcription
  • Images and documents for text extraction
  • Your Gemini API key (if provided)
  • Persona information for corpus generation

Supabase (Authenticated Users Only)

  • All account information and preferences
  • Messages and conversation history
  • Audio files and recordings
  • Search queries and usage patterns

3. How We Use Your Information

  • Communication Assistance: To provide text-to-speech, AI-powered suggestions, and transcription services
  • Personalization: To improve AI responses based on your communication patterns and preferences
  • Voice Synthesis: To generate speech audio using your selected voice and settings
  • Document Processing: To extract text from images and documents you upload
  • Service Improvement: To enhance our application's functionality and user experience

4. Data Retention

  • Local Data: Stored in your browser until you clear it or uninstall the application
  • External Services: Subject to each provider's retention policies (ElevenLabs, Google, Supabase)
  • API Processing: Most external services process data temporarily and don't retain it long-term

5. Your Privacy Rights

5.1 Data Control

  • Local Data: You have complete control - clear browser data to delete all local information
  • API Keys: You can revoke or change your API keys at any time through settings
  • External Services: Contact service providers directly to manage data they process

5.2 Data Portability

Since most data is stored locally, you can export your information by backing up your browser data or using our export features (where available).

6. Security

  • Local Storage: Protected by your device's security measures and browser isolation
  • API Communications: All external service communications use HTTPS encryption
  • No Server Storage: We don't store your personal data on our servers for unauthenticated users
  • API Key Security: Your API keys are stored locally and never sent to our servers

7. Third-Party Services

Our application integrates with:

  • ElevenLabs: Voice synthesis and cloning services
  • Google Gemini: AI-powered text generation and processing
  • Supabase: Cloud database for authenticated users

Each service has its own privacy policy. We recommend reviewing their policies to understand how they handle your data.

8. Medical Disclaimer

September is an assistive communication tool, not a medical device. We do not collect, store, or process personal health information beyond basic diagnosis categories you choose to share for personalization purposes.

9. Children's Privacy

Our service is not directed to children under 13. We do not knowingly collect personal information from children under 13. If you believe we have collected information from a child under 13, please contact us immediately.

10. Changes to This Policy

We may update this Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page and updating the "Last updated" date.

11. Contact Us

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

  • GitHub: Create an issue
  • Email: Create an issue on GitHub for the fastest response