A free app for Android, by Assistive Touch Soft.

Easy Touch is a handy utility that allows you to access and customize your Android device with a simple gesture. In fact, it allows you to easily operate your phone, tablet, or other Android devices with a single tap. It can be used as a replacement for your device’s home button, back button, recent button, and power button. It can also be configured to appear on any screen.

How to use:

To enable the Easy Touch on your device, you have to first install the app. Next, you have to enable the accessibility service. The final step is to configure the action that you want to perform.