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Privacy Policy

Last updated: March 13, 2026

1. Information We Collect

SightLine collects the minimum data necessary to provide our real-time AI vision assistance service:

  • Camera frames: Video frames are streamed in real-time to the Gemini AI model for scene description. Frames are processed transiently and are NOT stored on our servers unless you explicitly request a frame capture.
  • Audio data: Voice input is streamed to Gemini for natural language understanding. Audio is processed in real-time and is NOT recorded or stored.
  • Account data: Firebase authentication UID, email address (if Google sign-in is used), and authentication status.
  • Usage data: Session duration, mode selections, and daily usage time for free tier enforcement.
  • Preferences: User-selected settings (speech rate, verbosity, language, UI preferences).
  • Captured frames: Only when explicitly requested. Stored in Google Cloud Storage with automatic 7-day expiration.

2. How We Use Your Data

  • Provide real-time AI-powered scene descriptions and navigation assistance
  • Enforce usage limits and manage account tiers
  • Remember your preferences across sessions
  • Improve service quality and reliability
  • Comply with legal obligations

3. Data Sharing

We do NOT sell, rent, or trade your personal data. Data is shared only with:

  • Google Cloud Platform: Infrastructure provider (Firestore, Cloud Storage, Cloud Run, Vertex AI)
  • Google Gemini API: AI model provider for real-time vision and audio processing
  • Firebase Authentication: Identity management

All data processing occurs within Google Cloud's infrastructure with enterprise-grade security.

4. Your Rights

  • Access: View your data via the Dashboard
  • Deletion: Delete captured frames anytime. Request full account deletion by contacting us.
  • Portability: Export your conversation transcripts
  • Opt-out: Use the service anonymously without Google sign-in

5. Security

We implement industry-standard security measures including: encrypted data in transit (TLS 1.3), Firebase authentication tokens, CORS restrictions, rate limiting, CAPTCHA protection (Cloudflare Turnstile), Content Security Policy headers, and per-IP connection limiting.

6. Contact

For privacy inquiries, contact: privacy@sightline.app