Duofocus — Privacy Policy

Last updated: June 2026

        Short version: Duofocus stores everything locally on your device. No data is collected, transmitted, or shared with anyone — including the developer.
    

What Duofocus does

Duofocus is a Chrome extension that blocks or allows websites on a time-based schedule (Study, Free, Sleep modes). Settings are password-protected and all data stays on the device it is installed on.

Data stored — local only

Data	Purpose	Stored where
Schedule & mode rules	Controls which sites are blocked at which times	`chrome.storage.local` on your device
Password hash (salt + SHA-256)	Protects settings from being changed without a password	`chrome.storage.local` on your device
Usage statistics	Optional time-per-site tracking shown in the settings panel	`chrome.storage.local` on your device

What is NOT collected

No browsing history is sent anywhere
No personal information is collected
No analytics or telemetry
No external servers are used — ever
The developer has no access to any data

Permissions used

Permission	Why it's needed
storage	Save schedule, rules, password hash, and usage stats locally
declarativeNetRequest	Block or allow sites according to the schedule — all rules run locally
alarms	Check the schedule every minute to switch modes at the right time
tabs	Detect the active tab for optional usage time tracking
webNavigation	Detect redirect chains so the blocked page can show which domain needs to be added to the allowlist
<all_urls>	Required to evaluate and block/allow any website based on the schedule

Children's privacy

Duofocus is designed to help parents manage screen time for children. No data about children is collected or transmitted.

Changes to this policy

If this policy changes, the updated version will be posted at this URL with a new "Last updated" date.

Contact

Questions? Email abhinav@starmesh.ai