patternpulse

Privacy Policy for PatternPulse

Last updated: January 2025

Overview

PatternPulse is a Chrome extension that helps you practice algorithmic pattern recognition on LeetCode. We are committed to protecting your privacy.

Data Collection

We do not collect any personal data.

What We Store

PatternPulse stores the following data locally in your browser using Chrome’s storage API:

• Problems you’ve completed
• Patterns you’ve identified
• Number of hints used per problem
• Your streak count

What We Don’t Collect

• No personal information (name, email, etc.)
• No browsing history
• No analytics or tracking
• No data sent to external servers

Data Storage

All data is stored locally on your device using chrome.storage.local. This data:

• Never leaves your browser
• Is not accessible to us or any third party
• Is deleted if you uninstall the extension
• Can be exported or reset from the extension popup

Permissions

PatternPulse requires the following permissions:

Permission	Purpose
activeTab	To detect when you’re on a LeetCode problem page
storage	To save your progress locally
scripting	To inject the quiz UI on LeetCode pages
host_permissions: leetcode.com	To run only on LeetCode

Third-Party Services

PatternPulse does not use any third-party services, analytics, or tracking.

Changes to This Policy

We may update this Privacy Policy from time to time. Any changes will be reflected in the “Last updated” date above.

Contact

If you have questions about this Privacy Policy, please open an issue on our GitHub repository.

Your Rights

You have full control over your data:

• Export: Use the “Export Data” button in the extension popup
• Delete: Use the “Reset” button or uninstall the extension
• View: All data is visible in the extension popup

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TL;DR: Your data stays on your device. We don’t collect, store, or transmit any personal information.