Block smarter, not harder.
Flexible, powerful blocking that adapts to your workflow.
Domain & Page Blocking
Block entire domains or specific pages. Add sites to your list from the dashboard or directly while browsing.
Multiple Presets
Create and switch between multiple named block lists. Keep a work preset, a study preset, and a weekend preset separately.
Scheduled Blocking
Automatically activate blocking on specific days and time ranges. Set it once and let Sentry Shield enforce your schedule.
Invert Schedule
Flip the schedule — allow sites during your set hours and block everything outside of them. Full scheduling flexibility.
Control, not just block.
Sometimes you need a little time on a site — not free-for-all access.
Multi-Site Access
Give individual time limits to specific blocked sites. Spend 10 minutes on Reddit, 5 on Twitter — then they lock automatically.
All-Site Access
Grant yourself a timed window of access to all blocked sites at once. When time runs out, everything locks back down.
Pause & Resume Timers
Need to step away? Pause your limited access timer and pick up right where you left off — your remaining time is saved.
Automatic Timer Resets
Timers reset automatically on a schedule you define — daily, weekly, or monthly. No manual management needed.
Lock it down.
Comprehensive password protection so your settings can't be bypassed.
Dashboard Password
Protect your settings page with a password. Nobody can change your block rules without it — including future you.
Override Password
Require a password to temporarily unlock blocked sites. Great for building discipline — make it hard to give in.
Limited Access Passwords
Separately protect your multi-site and all-site access modes. Use the dashboard password or set dedicated ones.
Security Question
Set a security question as a backup to recover access to your dashboard if you forget your password.
Refined to the last detail.
Every part of Sentry Shield — from the popup to the blocked page — is sharp, fast, and considered.
Custom Blocked Message
Write your own message to show when a site is blocked. Remind yourself why you're focused, in your own words.
Motivational Quotes
Display an inspiring quote on the blocked page to keep your mindset sharp when distractions are shut out.
Live Timer on Blocked Page
See your remaining limited access time counting down directly on the blocked page — no need to open the popup.
Light, Dark & System Theme
Full theme support across the dashboard, popup, and blocked page. Matches your system preference automatically.
Backup & Restore
Export your entire configuration to a file and restore it anytime. Switch computers or reinstall without losing a thing.
Popup Quick Controls
Access timers, block status, and limited access controls straight from the toolbar popup — no need to open the full dashboard.
Why we need these permissions.
Sentry Shield only requests what it needs. Here's exactly what each permission is used for.
| Permission | Why it's needed |
|---|---|
| storage | Save your block lists, settings, and timers locally on your device |
| tabs / activeTab | Detect which site you're visiting to apply blocking rules |
| alarms | Run scheduled blocking and reset your timers automatically |
| windows | Track the active window accurately for timer purposes |
| webNavigation | Detect page navigations to enforce blocking even on redirects |
| <all_urls> | Required as a host permission to intercept requests on any site you choose to block |
Common questions.
Things people ask before installing.
Ready to take control?
Install Sentry Shield for free and start blocking smarter.