Screen Off and Lock Pro Widget MOD APK v3.2.1 (Pro Unlocked)

1. Executive Overview & Power Button Preservation

Modern phones are large and heavy. Most people turn their screen on and off dozens of times every single day. They check new messages, skip songs, or read quick alerts. Over time, physical power buttons suffer from daily wear and tear. On some phones, physical switches get loose, stop clicking, or break entirely.

Screen Off and Lock Pro Widget provides a fast, software-based solution. Created by Katecca Software, this classic utility gives you one-tap widgets, floating triggers, and smart gesture shortcuts to lock your screen. It eliminates the need to press physical hardware buttons, keeping your phone in great shape.

The app uses minimal resources. It uses under 10 MB of RAM. It draws zero battery when idle. It gives you fun retro TV animations and custom sound effects. Explore our full library of Android apps to find more utilities for your smartphone.

2. Pro Unlocked Features & Mod Menu Capabilities

The free version of basic lock tools often comes filled with banner ads and locked animation options. The Pro unlocked edition removes all limits, giving you full access to every premium utility.

• All Lock Animations Unlocked: Choose from classic CRT TV shutoff, horizontal blinds, smooth black fade, circular iris wipe, and page curl animations.
• Zero Advertisements: Enjoy a clean app menu with zero banner ads, video popups, or promotional interruptions.
• Mod Menu Features Checklist: Easily toggle floating buttons, notification bar shortcuts, proximity sensor locks, and vibration feedback from one screen.
• Works Without Root: The app locks your device securely using standard Android system tools without root privileges.
• Biometric Fingerprint Support: Sleep your screen while keeping fingerprint and face unlock active on modern Android devices.
• Custom Sound Effects: Pair your screen lock with classic typewriter clicks, mechanical camera shutters, laser snaps, or silent mode.
• Floating Action Trigger: Place a semi-transparent lock button over your apps so you can lock your screen from any game or browser.

If you also want to customize how quickly your screen turns off when left alone, read our review of Screen Timeout Pro.

3. Biometric Fingerprint Preservation & Lock Methods

Older screen lock tools had a big flaw. They used Device Admin to lock the phone. Android treated this as a strict company lockdown. Because of that, users had to type a long PIN every time they woke the phone. This made fingerprint scanners completely useless.

Screen Off and Lock Pro fixes this frustration by offering two distinct locking methods:

• Modern Accessibility Lock (Recommended): On Android 9.0 and newer, the app uses Android Accessibility Service to trigger system sleep. This lets you wake your phone and unlock instantly using your fingerprint or face scan without typing a PIN.
• Device Administrator Lock: This classic method works on older Android versions. It enforces an instant security lock, ideal for users who want strict PIN security after every screen turn-off.
• Smart Timeout Emulation Mode: On devices that lack Accessibility sleep support, the app can temporarily lower your screen timeout to zero seconds. This fades the display black and lets the phone enter normal sleep while preserving fingerprint security.
• Lock Screen Delay Setting: You can set a 5-second grace period after locking. If you tap the screen within 5 seconds, the phone turns back on without demanding security credentials.
• No-Wake Pocket Safety Guard: When you lock the device using the widget, the app checks if the proximity sensor is covered before waking. This completely stops random pocket wakeups.

You can easily switch between these two modes in the app settings tab to match your personal security preferences.

4. Technical Specifications & Package Details

Review the package metadata and security hash below before installing the application on your Android handset.

5. How to Install and Setup Screen Off and Lock Pro on Android

Installing and setting up Screen Off and Lock Pro takes less than two minutes. Follow this step-by-step guide to get started.

1. Download the Verified APK: Download the package from our download portal. Check that the file size matches 6.8 MB.
2. Allow Unknown Sources: Go to phone Settings > Security > Install Unknown Apps. Turn on permission for your browser or file manager.
3. Install the App: Tap the downloaded file in your notification bar and press Install.
4. Select Lock Method: Open the app. Choose between Accessibility Service (keeps fingerprint working) or Device Admin. Grant the requested permission prompt.
5. Add Widget to Home Screen: Long-press any empty space on your home screen. Tap Widgets, find Screen Off and Lock, and drag the widget icon to your desktop.

Now you can tap the widget whenever you want to sleep your phone, saving your physical power switch from wear.

6. Custom Widget Icons & Floating Button Controls

Different users have different home screen designs. Some people prefer colorful icon setups, while others like sleek dark themes. Screen Off and Lock Pro includes multiple styling choices.

• Transparent Invisible Widget: Place a 1x1 clear widget in any corner of your home screen. Tap the empty space to lock your phone without cluttering your wallpaper.
• Multiple Icon Packs: Choose from red power buttons, sleek flat circles, neon power switches, or classic metal switches.
• Floating Overlay Trigger: Turn on a small floating lock button that stays visible over other apps. You can set the button transparency and drag it to any screen edge.
• Quick Settings Tile: Add a dedicated Screen Off tile into your Android pull-down notification menu for instant access from any screen.

To customize your entire home screen with clean Pixel styling, you can pair this widget with Ruthless Launcher Pro.

7. Retro Lock Animations and Audio Feedback

Turning off your phone screen does not have to be boring. Screen Off and Lock Pro includes a great collection of visual animations and sound effects.

Classic CRT TV Animation: This fan-favorite effect mimics vintage cathode-ray tube televisions. When you tap to lock, the screen collapses into a bright horizontal line before shrinking into a glowing center dot that fades away.

Other Visual Styles: You can also choose window blinds closing, smooth cinematic black fade, circular iris shutter, or page turn animations. You can adjust animation playback speeds from fast 200ms snaps to slower 600ms transitions.

Sound Effects: Add satisfying audio feedback like retro camera clicks, typewriter bells, laser beams, or subtle haptic vibration hums. If you prefer quiet operation, you can mute sounds with one tap.

8. Proximity Sensor Pocket Mode and Smart Gestures

Accidental screen taps inside pockets or bags waste battery life. They can also dial random contacts by mistake. Screen Off and Lock Pro includes smart sensor tools to stop these accidents completely.

• Automatic Pocket Lock: The app monitors your phone top proximity sensor. When you slide your phone into your pocket, the sensor detects cover and sleeps the screen automatically.
• Face-Down Table Lock: Placing your smartphone face down on a desk or table immediately turns off the display, saving power during meetings.
• Shake to Lock: Configure phone shake gestures to sleep your phone. You can customize shake sensitivity so everyday walking does not trigger false locks.
• Cover to Wake Guard: If the sensor is covered, the app stops accidental screen wakeups in backpacks or purses.

These automated sensor options make device management smooth and easy without requiring extra physical effort.

Hardware Sensor Calibration Tip: In the advanced settings tab, you can test your phone infrared proximity sensor in real time. The app shows an active distance readout in centimeters. For devices with virtual acoustic proximity sensors (such as certain Xiaomi and Samsung mid-range phones), set the trigger threshold to 3 centimeters. This prevents random screen locks when holding the phone at an angle during phone calls or reading sessions.

9. Honest Pros & Cons Matrix

We tested Screen Off and Lock Pro across different Android versions to evaluate its performance. Here is our balanced assessment of its pros and cons.

10. Security Audit, Permissions & VirusTotal Verification

Apps that lock your screen require special Android system authority. It is essential to verify that the app uses only necessary permissions and stays safe.

Screen Off and Lock Pro uses minimal system permissions:

• Accessibility Service (Optional): Used to trigger display sleep on modern Android while keeping fingerprint unlock working.
• Device Administrator (Optional): Used for instant system-level locking on older devices.
• Proximity Sensor Access: Used exclusively to detect pocket state and face-down desk placement.
• Display Over Other Apps (Optional): Only needed if you choose to turn on the floating lock button.

We ran this APK through 70 security engines on VirusTotal. It scored a clean 0/70 rating with zero threats detected. The package contains no adware, tracking tools, or hidden code. Review our VirusTotal Clean / Security Verified standards for full details.

Verified Checksum: b9a147820cd49f3e4810a95e2d6b3c4f7a18e05c8932b1d647e58a2f1c098d74
VirusTotal Report: View Official 0/70 Clean Inspection Report

11. Safe Device Admin Removal and Uninstallation Guide

Android protects Device Admin apps from quick deletion. Dragging the app to the trash can show an error. Follow these clear steps to remove the app safely:

1. Use In-App Uninstall Button: Open Screen Off and Lock Pro. Scroll down the menu and tap Uninstall App. The app deactivates Device Admin and uninstalls automatically.
2. Manual System Deactivation: If you already deleted the shortcut, go to phone Settings > Security > Device Admin Apps. Turn off Screen Off and Lock.
3. Uninstall Normally: Once Device Admin is off, go to Settings > Apps and tap Uninstall like any normal application.

If you use the modern Accessibility Service lock method instead of Device Admin, you can uninstall the app immediately without these extra steps.

12. Fixing Common Screen Lock and Permission Problems

If you encounter any unexpected issues with screen locking or fingerprint waking, these quick tips will resolve them in seconds.

• Fingerprint Demands PIN Code: Open app settings and switch your lock method from Device Admin to Accessibility Service. This restores instant fingerprint waking.
• Widget Stops Working After Phone Sleep: Check phone battery optimization settings. Ensure Android does not put Screen Off and Lock to sleep in the background.
• Proximity Lock Too Sensitive: Open sensor settings and adjust the pocket lock delay to 1.5 seconds. This stops accidental screen locks when waving your hand near the top speaker.
• Floating Button Overlaps Apps: Long-press and drag the floating button to your preferred screen edge, or lower its transparency in settings so it stays subtle.
• Animation Plays Too Slowly: In the animation menu, move the playback speed slider to 250 milliseconds for a crisp, snappy screen turn-off.
• One UI and MIUI Battery Whitelist: On Samsung, Xiaomi, and Redmi devices, add Screen Off and Lock to the Never Sleeping Apps whitelist. This stops the vendor system from unloading the Accessibility Service after prolonged standby.
• Widget Label Customization: In the widget settings panel, you can type a custom label or delete the title completely. Removing the label gives you a clean icon-only look that matches minimalist launchers.
• Volume Key Lock Trigger: Enable volume down long-press to turn off your screen while the phone is sitting on a desk. This provides an instant tactile lock method without picking up the phone.
• Custom Lock Tile for Quick Settings: Pull down your notification shade twice, tap the pencil edit icon, and drag the Screen Off tile into your top active row. This gives you a one-tap sleep switch right next to your Wi-Fi and Bluetooth toggles.

Screen Off and Lock Pro offers a dependable, lightweight way to sleep your Android screen and keep your hardware power button working like new.