In order to uninstall or delete an existing app on the device you can either uninstall from the device itself as any other regular app. This way of uninstalling requires more steps,  developers can do it faster via the ADB  tool using the following command:


adb shell am start -a android.intent.action.DELETE -d package:<your app package>


e.g  If the package name of the app is com.codercrunch.app, the command will look it.


adb shell am start -a android.intent.action.DELETE -d package:com.codercrunch.app