Android Remote is a Android application that makes your device act as a remote control for the project in Unity. This is useful for rapid development when you don’t want to compile and deploy your project to device for each change.
Unity has replaced Android Remote with the new Unity Remote 5.
To use Android Remote, you should firstly make sure that you have the latest Android SDK installed (this is necessary to set up port-forwarding on the device). Then, connect the device to your computer with a USB cable and launch the Android Remote app. When you press Play in the Unity editor, the device will act as a remote control and will pass accelerometer and touch input events to the running game.