Never miss an important change on the web.
Site Sentry Webpage Tracker is a native macOS app that checks the web pages you care about, records changes and notifies you when something needs your attention.
Track competitor websites, product and pricing pages, announcements, job listings, regulations or any other web content that matters to you.
Redesigned for version 2.0
The new Overview helps you:
• See changes waiting for review
• Find monitors that need attention
• Track healthy monitors
• See when the next check will run
• Check all pages with one click
Review every change
The new Activity screen turns your history into an actionable review queue:
• Mark changes as reviewed or unreviewed
• Classify them as important, routine or noise
• See how much content was added or removed
• Compare previous and current content
• Open the monitored page in your browser
Understand monitor health
For every monitor, view the last check, last successful check, last change, next scheduled check, consecutive failures and retry/backoff status. When a check fails, retry immediately, edit the monitor or pause it temporarily.
Flexible monitoring rules
Configure a check interval, name, category, regular expression and numeric threshold for each page. If a change does not match your rule, Site Sentry updates the page state without sending an unnecessary notification.
Local snapshots and history
Your monitoring history stays on your Mac:
• HTML snapshots
• Change and error records
• Previous content comparisons
• Per-page snapshot management
• Configurable history retention and storage cleanup
Notifications and bulk management
Manage a growing workspace with local notifications, daily digests, quiet hours, live search, status filters, multi-selection, bulk checks and CSV import/export.
Privacy-first by design
Site Sentry Webpage Tracker runs entirely on your Mac:
• No account required
• No mandatory cloud service
• Monitored content stays on your device
• Snapshots and history are stored locally
• No personal data collection
Designed for founders, product managers, consultants, researchers, analysts and anyone who needs a private way to stay informed about changes across the web.