Silent Angel Signal
SAS — YOUR SILENT GUARDIAN
A discreet personal safety alarm for Android. One tap sends your GPS location to trusted contacts, triggers stealth recording, and keeps tracking you live — all without anyone knowing you activated it.
Free plan available · Premium from £4.99/month · 7-day free trial
Traffic Light Alert System
Two Levels of Alert
SAS uses a traffic light system so your contacts know exactly how serious the situation is.
Sends an SMS to all your trusted contacts with your GPS location and a live tracking link.
Full emergency response: loud alarm, SMS to all EMERGENCY contacts, live GPS tracking, stealth recording, and a 999 shortcut.
What SAS Does
Built for Real Emergencies
Your location updates every 30 seconds and is shared via a live tracking link sent to all your contacts.
Contacts receive an SMS the moment you trigger an alert, containing your GPS coordinates, UK street address, and alert level.
Records audio evidence in the background while the screen appears blank. No visible recording indicator.
⭐ PremiumCaptures video evidence discreetly while the screen stays dark. Recordings can be used as court-admissible evidence.
⭐ PremiumOnce triggered, the alarm can only be deactivated with your secret PIN. No one else can cancel the alert.
Choose between a silent covert alert or a loud alarm that deters attackers and draws attention from bystanders.
GPS coordinates are automatically converted to a full UK street address using OpenStreetMap.
One-tap button to call 999 directly from the active alarm screen. No need to navigate away.
Add up to 1 contact on the free plan, or unlimited contacts on Premium. All contacts alerted simultaneously.
Covert Activation
Trigger Without Unlocking Your Phone
SAS listens for a rapid sequence of volume button presses — even when your screen is locked — and triggers the alarm instantly and silently.
Getting Started
How It Works
Install SAS on your Android device. Create a secret 6-digit PIN that only you know. This PIN is the only way to disarm an active alert.
Add the phone numbers of people you trust — family, friends, colleagues. Free plan supports 1 contact; Premium supports unlimited.
Set how many volume button presses trigger AMBER and RED alerts. Choose silent or loud mode. Grant location and microphone permissions.
SAS runs in the background. If you ever feel unsafe, press the volume button the required number of times — your contacts are alerted instantly with your live location.
When the situation is resolved, enter your secret PIN to disarm the alert. The tracking session closes and contacts see a confirmation that you are safe.
Plans
Simple, Transparent Pricing
Start free. Upgrade when you need more protection.
- ✓ 1 trusted contact
- ✓ AMBER & RED alerts
- ✓ Live GPS tracking link
- ✓ UK street address in SMS
- ✓ PIN-only disarm
- ✓ Silent or loud mode
- ✓ 999 shortcut
- ✗ Stealth audio recording
- ✗ Stealth video recording
- ✗ Unlimited contacts
- ⭐ Everything in Free
- ⭐ Unlimited contacts
- ⭐ Stealth audio recording
- ⭐ Stealth video recording
- ⭐ Priority support
- ⭐ Cancel anytime
No charge for 7 days
- ⭐ Everything in Free
- ⭐ Unlimited contacts
- ⭐ Stealth audio recording
- ⭐ Stealth video recording
- ⭐ Priority support
- ⭐ Best value
7-day free trial included
Download Silent Angel Signal
Available now for Android. iOS coming soon. Free to download.
Android 8.0+ required · 7-day free trial on Premium plans · Cancel anytime