Applock Pro - App Lock & Guard

Your Private Data Needs a Dedicated Guardian—Not Just a Screen Lock

Every app on your phone collects some form of data: contacts, photos, messages, banking credentials, or social media logins. A single passcode on the lock screen is not enough to stop a curious friend, a family member, or even a malicious third party who gains temporary access to your unlocked device. Once someone is inside your phone, every app becomes an open book. Applock Pro - App Lock & Guard solves this specific vulnerability by adding a secondary, independent authentication layer directly on top of any application you choose. It doesn't just lock the phone—it locks the app itself, so that even if your device is unlocked, sensitive content remains behind a separate PIN, pattern, or biometric check.

Core Locking Mechanics and Access Controls

The primary function of Applock Pro is straightforward: you select which installed applications require a password to open, and the app intercepts the launch request, overlaying a secure authentication screen before the target app can render. This interception happens at the system level, meaning it works across all launchers, including stock Android, Samsung One UI, Xiaomi MIUI, and custom ROMs, as long as the device runs Android 7.0 or newer.

Authentication options include a numeric PIN (4–16 digits), an unlock pattern (minimum 3×3 nodes), or a custom alphanumeric password. On devices with a fingerprint sensor or face unlock hardware (supported via Android's BiometricPrompt API), you can bypass the lock screen entirely with a biometric scan. The app also supports a "panic switch" gesture—if you are forced to unlock an app under duress, entering a secondary emergency PIN will unlock the app but secretly send an SMS alert to a pre-configured contact with your GPS location.

A key architectural detail is that Applock Pro runs as a background service with a persistent notification. This is required to monitor app launches in real time. The app consumes roughly 15–25 MB of RAM in idle mode and adds approximately 50–100 ms of latency to app launches due to the security overlay. This overhead is negligible on modern devices but may be noticeable on older or low-RAM phones (2 GB or less).

Feature Breakdown

• Per-App Locking with Intruder Selfie Capture
  Assign unique lock methods to individual apps; any failed unlock attempt automatically captures a front-camera photo of the intruder and timestamps it in the audit log.

• Stealth Mode Icon and Notification Hiding
  Replace the Applock Pro icon with a generic system tool icon (e.g., "Settings" or "Calculator") and suppress all lock screen notifications so the app's presence remains invisible.

• Time-Based and Wi-Fi/Bluetooth Smart Unlock
  Automatically disable app locks when connected to trusted Wi-Fi networks (home, office) or paired with specific Bluetooth devices (car, smartwatch), reducing friction during routine use.

• App Usage Statistics and Lock History
  View a chronological log of every locked app launch, including successful unlocks, failed attempts, and the duration each locked app was used after authentication.

• Remote Lock via SMS Command
  Send a predefined text message from another phone to your device to instantly lock all protected apps, even if your phone is already unlocked and unattended.

Why This Approach Outperforms Simple Screen Locks

A standard device lock screen protects against unauthorized physical access to the phone. Applock Pro protects against unauthorized access to specific data after the phone is already unlocked. This distinction matters in shared-device scenarios—handing your phone to a friend to show a photo, lending it to a child for a game, or leaving it on a desk at work. Without app-level locking, any person with access to your unlocked home screen can open your email, banking, or messaging apps. With Applock Pro, they see only the lock overlay.

The intruder selfie capture feature adds forensic value. If someone tries to guess your PIN repeatedly, the front camera silently captures their face and saves it with a timestamp. This creates an evidence trail that a simple screen lock cannot provide. The smart unlock feature reduces annoyance by disabling locks in trusted environments—your home Wi-Fi or car Bluetooth—so you are not constantly entering passwords in safe zones.

Performance-wise, the app uses Android's UsageStatsManager and AccessibilityService APIs to detect app transitions. This method is reliable but requires the user to grant accessibility permissions during setup. Without these permissions, the app cannot intercept launches in real time. The developer has confirmed that no user data is transmitted to external servers; all lock configurations, photos, and logs remain stored locally on the device.

Download Applock Pro Now

Stop relying on a single lock screen to protect dozens of sensitive apps. Get granular, per-application security with biometric unlock, intruder detection, and smart auto-unlock. Install Applock Pro - App Lock & Guard today and take control of who sees what on your phone. Limited offer: first-time users get 7 days of premium features (intruder selfies, stealth icon, and remote lock) completely free. After the trial, the core locking function remains free with ads.

Heads up: You'll need to grant Accessibility Service and Usage Access permissions for the app to work correctly—these are standard for app lockers on Android. Some premium features (intruder selfie, stealth mode, remote SMS lock) require a subscription after the trial period. A stable internet connection is required for the remote lock SMS feature to send commands; all other functions work offline.