Privacy Policy

Welcome to Lang Fast (“we”, “our”, “us”).
This Privacy Policy explains how we collect, use, and protect information when you use our platform.

1. Information We Collect

a. Profile Data

When you sign in using Google Sign‑In, we receive your name, email address, and profile picture (avatar).
This information helps personalize your chat experience and display your identity in conversations.

b. Usage Analytics

We use Google Tag Manager and Vercel Analytics to understand usage patterns and optimize performance.
All analytics data is aggregated and remains non‑identifiable.

c. Error Diagnostics

We use Sentry for collecting anonymous crash reports to improve app reliability.

We do not store messages or conversation content from your chat sessions.

2. How We Use Information

We use your data to:

• Authenticate users and provide access to chat rooms.
• Display your profile information to personalize your experience.
• Monitor system performance and troubleshoot errors.

3. Your Data Rights

You can:

• Review, edit, or delete your data at any time.
• Request full data deletion by using the built‑in Delete Account feature.

When you delete your account, your profile data is removed from our database permanently.

4. Data Sharing

We do not sell or trade your information.
Limited third‑party integrations may process data:

• Google (authentication, analytics)
• Vercel (hosting and analytics)
• Sentry (error reporting)

These providers handle data in compliance with their own privacy standards.

5. Security & Retention

We use HTTPS encryption and secure cloud storage.
Your data remains only as long as necessary to operate the service or until you delete your account.