Quiet by default
Built for attention, not anxiety.
Sentinel opens on a live map and groups connections by app, so the first thing you see is behavior, not a wall of processes.
Rules stay local. History is bounded. No analytics or tracking SDKs are included in the app.
Map-first monitor App icons and grouped system traffic Local privacy posture User-approved filtering
Local-first privacy
Your connection history belongs on your Mac.
No tracking
The app does not include advertising SDKs, analytics SDKs, or automatic crash-report uploads.
No silent IP lookup service
Destination geolocation uses a bundled GeoIP database where available.
Bounded retention
Connection history can be live-only or retained locally for a limited period.
Guangyu Song
Sentinel is being prepared for the Mac App Store.
For questions, testing, or privacy requests, contact sentinel@guangyusong.com.