The Sentry Noise Alarm & Guard

Ever wonder if someone entered your room while you were away? The Sentry turns your smartphone into a professional-grade, noise-sensitive security system — no hardware required.

How It Works
Set your sensitivity threshold, tap ARM, and step out. The Sentry listens for sounds — a door opening, footsteps, whispering — and triggers a powerful alarm the moment anything crosses your threshold.

What's New in v2.0
* Camera Trap — front camera silently captures photo evidence of the intruder
* Background Monitoring — system keeps watching even when the app is minimized
* Silent Spy Mode — no alarm, just quiet logging and audio recording
* Full Event Timeline — every armed session, alert, and photo stored locally
* Audio Playback — replay recorded sounds directly from the event log
* Redesigned UI — sleek Material 3 dark interface built for modern Android

Use Cases
* Hotel & Airbnb rooms — portable door alarm when traveling
* Dorm & shared spaces — know if your roommate enters your room
* Home office — monitor your desk or valuables while away
* Baby monitor — get alerted when your baby wakes up

Pro Features
Unlock the full power of The Sentry with a single one-time purchase.
— Camera Trap: front camera captures photo evidence on detection
— Silent Spy Mode: no alarm, secretly logs audio and events
— Audio Recording: record and replay intruder audio
— Background Monitoring: stays active when app is minimized
— Unlimited Event History: full log stored on your device
No subscription. No cloud. Everything stays on your device.