1. Introduction

Welcome to Piping Engineering AI ("we," "our," or "us"). We are committed to protecting your privacy and ensuring transparency about how we collect, use, and protect your personal information. This Privacy Policy explains our practices regarding data collection and usage when you use our mobile application.

2. Information We Collect

2.1 Account Information

When you create an account, we collect:

• Email address
• Display name (if provided)
• Profile photo (if provided via Google Sign-In)
• Authentication credentials (securely stored via Firebase Authentication)

2.2 Chat Data

We collect and store:

• Chat conversations and messages
• Chat titles and timestamps
• Message content and attachments (images, PDFs, documents)

2.3 Usage Data

We may collect:

• App usage statistics
• Subscription status and purchase history
• Error logs and crash reports (via Firebase Crashlytics)

3. How We Use Your Information

We use your information to:

• Provide and maintain our AI chat service
• Process your messages and generate AI responses
• Manage your account and authentication
• Process subscription purchases and manage usage limits
• Improve our services and fix technical issues
• Comply with legal obligations

4. Data Storage and Security

4.1 Data Storage

Your data is stored securely using:

• Firebase Firestore: Chat conversations, messages, and user profiles
• Firebase Storage: Uploaded files (images, PDFs, documents)
• Firebase Authentication: User account credentials

4.2 Data Encryption

All data transmitted between your device and our servers is encrypted in transit using HTTPS/TLS protocols. Firebase services use industry-standard encryption to protect your data.

4.3 Data Retention

We retain your data for as long as your account is active. You can request account deletion at any time (see Account Deletion page).

5. Third-Party Services

5.1 OpenAI

We use OpenAI's Assistants API to process your messages and generate AI responses. When you send a message or upload a file:

• Your message content is sent to OpenAI for processing
• Uploaded files are temporarily stored by OpenAI for AI analysis
• OpenAI's use of your data is governed by their Privacy Policy

5.2 Firebase (Google)

We use Google Firebase services for:

• User authentication (Firebase Authentication)
• Data storage (Firestore and Storage)
• Cloud Functions (server-side processing)
• Error tracking (Crashlytics)

Firebase's use of your data is governed by Google's Privacy Policy.

5.3 Google Sign-In

If you choose to sign in with Google, Google will share your basic profile information (name, email, photo) with us. This is governed by Google's Privacy Policy.

5.4 Google Play Billing

Subscription purchases are processed through Google Play Billing. Payment information is handled by Google and is subject to Google's Privacy Policy.

6. Your Rights

You have the right to:

• Access: Request a copy of your personal data
• Deletion: Request deletion of your account and all associated data (see Account Deletion page)
• Correction: Update your account information through the app
• Portability: Export your chat data (contact us for assistance)

7. Children's Privacy

Our service is not intended for users under the age of 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.

8. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. We will notify you of any changes by updating the "Last Updated" date at the top of this page. We encourage you to review this Privacy Policy periodically.

9. Contact Us

If you have any questions about this Privacy Policy or our data practices, please contact us:

Email: info@pipingtoolbox.com