Sanctum: Security & App Lock

Sanctum is your complete mobile security solution, protecting your Android device from malware, spyware, theft, and privacy invasions — all in one app.
APP SCANNER
Scan every app on your device for malware, suspicious permissions, and known threats. Sanctum analyses permission combinations, install sources, and app behaviour to assign a risk score to each installed app. Get detailed reports on exactly what each app can access and why it may be a risk to your privacy or security.
APP LOCK
Lock any app behind a PIN or biometric authentication. Whether it's your banking app, messages, gallery, or email — Sanctum intercepts app launches and requires verification before access is granted. Your sensitive apps stay private even if someone else picks up your phone.
NETWORK PROTECTION
Monitor your device's active network connections and WiFi security in real time. Sanctum evaluates your WiFi network for vulnerabilities, detects suspicious outbound connections, and alerts you to potential data exfiltration attempts. Stay protected on public and private networks alike.
SURVEILLANCE DETECTION
Detect spyware, stalkerware, and monitoring software that may have been secretly installed on your device. Sanctum scans for suspicious accessibility services that may be reading your screen, unauthorised device administrator apps, call forwarding indicators from your carrier network, apps with unusual hardware access to your microphone or camera, and known spyware signatures and behaviours.
ANTI-THEFT PROTECTION
If your device is ever lost or stolen, Sanctum gives you the tools to recover or protect it remotely. Features include real-time GPS tracking, SIM card change detection, and remote SMS commands from your pre-authorised trusted phone number — even when the device has no internet connection.
Remote commands include:
- SANCTUM LOCATE: receive the device's GPS coordinates by SMS
- SANCTUM LOCK: remotely lock the device immediately
- SANCTUM WIPE: factory reset as a last resort (requires two-step confirmation)
- SANCTUM RING: make the device ring at full volume to locate it nearby
- SANCTUM STATUS: receive a full status report by SMS
PRIVACY GUARD
Monitor which apps on your device have access to sensitive permissions — camera, microphone, location, contacts, and more. Understand your device's full privacy exposure at a glance and identify apps that may be overreaching.
WHY SANCTUM?
Unlike cloud-based security apps that upload your data to remote servers, Sanctum processes everything locally on your device. Your scan results, location history, app lock settings, and security data stay on your phone — never on ours.
SUBSCRIPTION
Premium features including App Lock, Anti-Theft Protection, Surveillance Detection, and Real-Time Protection require a Sanctum subscription. New users receive a 3-day full-access trial to experience everything Sanctum has to offer before committing to a plan.
PERMISSIONS EXPLAINED
Sanctum requests only the permissions required for each specific feature:
- Location: Anti-Theft GPS tracking, enabled only when you turn on Anti-Theft Protection
- SMS: Remote anti-theft commands, enabled only when you turn on SMS Commands
- Phone State: SIM card change detection and carrier call forwarding indicator
- Accessibility Service: App Lock launch interception and installation monitoring
- Usage Statistics: App Lock foreground app detection
- All Packages: App Scanner malware and threat detection

Developed by Guardlinkx Technologies LLC

Recent changes:
New subscription screen with free-trial option for Sanctum Premium
• Manage your subscription directly in Settings → Subscription
• Fixed Anti-Theft service crash on Android 14
• Faster app scans and permission monitoring
• Improved billing reliability