Screen Off and Lock is a free utility app developed by HDL Dev for Android devices. The app is designed to turn off and lock the screen of your phone without using the power button, which can become greasy and unresponsive over time.

With this app, you can easily lock your screen by simply tapping on the icon available on the home screen or in the notification panel. The app uses the Device Administrator permission, which allows it to lock the screen even when other apps are running in the foreground.

Moreover, Screen Off and Lock is very easy to use and doesn't require any technical skills. It's a useful app for people who want to reduce the burden on their power button and avoid any accidental taps while trying to turn off the screen. To uninstall the app, you need to go to the phone's settings, then to security, device administrators, and uncheck Screen Off and Lock. Afterwards, go to the phone's settings, then to apps, Lock Screen, and tap uninstall.

Overall, Screen Off and Lock is a simple yet effective app that can make your phone usage more comfortable and convenient.