Android emulators for computer 

They emulate a virtual Android environment on a computer, allowing users to interact with applications using a mouse, keyboard, and/or joystick.

There are several Android emulators available for free such as BlueStacks, NoxPlayer, and Android, among others.

They are useful for those who want to test Android apps in a controlled environment, play mobile games on a larger screen device, and for app developers who want to test their apps on multiple versions of Android.