Use APKPure App
Get always visible screen lock old version APK for Android
Screen lock is possible even while the app is running.
You can lock the screen at any time while the app is running by clicking the on-screen button.
You can lock the screen without pressing the power button.
Supports the ability to change the default lock screen.
In the widget, you can toggle an on-screen button or lock the screen.
In the notification bar, you can turn the button on the screen off and on or lock the screen.