Focus Lock — Privacy Policy

Last updated: May 11, 2026

Focus Lock is a Chrome extension that helps users block distracting websites during focus sessions. This policy describes how the extension handles user information.

What data we collect

None. Focus Lock does not collect, transmit, sell, or share any personal information, browsing data, or usage information with anyone, ever.

What data is stored locally

Focus Lock stores the following information using Chrome's built-in chrome.storage.local API. This data is stored only on your device and is never sent anywhere:

• The list of websites you choose to block or allow
• Your scheduled focus sessions (days, times, and site lists)
• Your current focus session state (start time, end time, mode)
• Your focus statistics (daily focused minutes, total session count)
• Your extension preferences (e.g. whether math-problem friction is enabled)

This data stays on the device where you installed the extension. It is not synced across devices, and we do not have access to it.

Permissions we request and why

• "storage" — to save your blocklist, schedules, stats, and preferences locally on your device.
• "declarativeNetRequest" — to redirect requests for your blocked sites to the extension's local block page during active focus sessions. This API is designed by Google specifically so that extensions cannot read the contents of network requests.
• "alarms" — to end focus sessions on time and to check schedules.
• host_permissions <all_urls> — required so that the user can choose to block any website. The extension does not read, modify, or transmit the contents of any page.

Third parties

Focus Lock does not use any third-party services, analytics platforms, advertising networks, or tracking SDKs.