Twitter Watcher Privacy Policy

1. Overview

Twitter Watcher ("we," "our," or "the app") is a Chrome browser extension committed to protecting user privacy. This privacy policy explains how we collect, use, store, and protect your personal information.

2. Information We Collect

2.1 For Free Users

We do not collect any personally identifiable information. All your subscription lists and settings are stored locally in your browser and are never transmitted to our servers.

2.2 For Premium Users (Google OAuth)

When you sign in with your Google account to access premium features, we may collect the following information solely for account verification and premium feature access:

• Basic profile information: Name, email address, Google user ID
• Authentication tokens: Used to verify your identity and maintain login status

We do not store your Google password or access any other Google services.

2.3 Payment Information

All payment transactions are securely processed by Stripe. We do not store or access your credit card numbers or financial information.

2.4 Application Usage Data

• Subscription information: List of Twitter users you subscribe to (stored locally)
• Settings preferences: Notification settings, app configuration (stored locally)
• Usage statistics: Feature usage frequency (anonymized, not linked to identity)

2.5 Automatically Collected Information

• Device information: Browser version, operating system type (anonymized)
• Log information: Application error logs, performance data (anonymized)

3. How We Use Information

We use the collected information for:

3.1 Core Functionality

• User authentication and account management
• Providing Twitter user subscription services
• Sending tweet update notifications

3.2 Service Improvement

• Analyzing app performance and usage patterns
• Identifying and fixing technical issues
• Developing new features and improving user experience

3.3 Account Management

• Distinguishing between free and premium users
• Processing paid subscription services
• Providing customer support

4. Google OAuth Integration

4.1 Authentication Scope

We only request necessary Google permissions:

• Basic profile: For user identification and display
• Email address: For account association and communication

4.2 Data Security

• All OAuth tokens are stored with encryption
• We do not store your Google password
• Token transmission uses HTTPS secure protocol

4.3 Third-Party Access

• We do not sell your Google account information to third parties
• We do not access your other Google services without authorization

5. Use of Chrome Permissions

We request certain Chrome permissions strictly to provide core functionality:

• storage: To save your preferences and subscription list locally.
• notifications: To send you alerts about new tweets.
• alarms: To schedule periodic checks for updates.
• tabs: To assist with authentication and open relevant pages.

We do not use these permissions to collect unnecessary data or track your browsing activity.

6. Data Storage and Security

6.1 Storage Locations

• Local storage: Most user data, including your Twitter subscriptions and settings, is stored only in your local browser storage and is never uploaded to our servers, except for premium account management.
• Server storage: Only premium user accounts and related subscription data are stored on our secure servers.

6.2 Security Measures

• Data transmission uses SSL/TLS encryption
• Server data is encrypted
• Regular security audits and updates

6.3 Data Retention

• Account data: Retained while you use our service
• Log data: Retained for up to 90 days
• After account deletion, personal data will be completely removed within 30 days

7. Data Sharing

We do not sell, trade, or share your personal information with advertisers or data brokers. Data may be shared only with trusted service providers (such as server hosting and payment processors) under strict confidentiality agreements, and only as necessary to provide our services.

8. Your Rights

You have the following rights:

8.1 Access Rights

• View information we have collected about you
• Obtain copies of your data

8.2 Correction Rights

• Update or correct inaccurate personal information

8.3 Deletion Rights

• Request deletion of your personal data
• Revoke Google OAuth authorization

8.4 Data Portability

• Export your data in machine-readable format

9. Cookies and Local Storage

9.1 Purpose of Use

• Save login status
• Store app settings and preferences
• Cache subscription data to improve performance

9.2 Management Options

You can manage or clear stored data through your browser settings.

10. Children's Privacy

Our service is not directed to children under 13. If we discover we have collected personal information from children, we will immediately delete the relevant data.

11. International Data Transfers

Your data may be transferred to servers outside your country/region. We ensure appropriate security measures are in place to protect data in transit.

12. Privacy Policy Updates

We may periodically update this privacy policy. Significant changes will be communicated through in-app notifications or email.

13. Contact Us

14. Google API Services User Data Policy Compliance

This application strictly complies with Google API Services User Data Policy, ensuring:

• User data is only used for explicitly stated purposes
• We do not sell user data to third parties
• We do not use user data for advertising purposes
• We employ modern encryption technology to protect user data