A free app for Android, by Rules Savers.

The Cast To TV Chromecast Miracast is a very powerful screen mirroring tool that is able to cast your Android smartphone or tablet screen and audio as an external display for your home TV. This is very useful if you are using a small laptop or tablet that does not have a built-in screen or if you are using a Chromecast. You will not need to download any additional software or drivers for this app. You will not need to connect your smartphone or tablet to your home network in order for this app to work.

This app is very easy to use and it is designed to be used by people who do not have any knowledge of network technology and Wi-Fi.