Yes, google earth is completely free to use. It is an application that offers services without charging an amount and all it requires is access to an internet connection. Google Earth can be downloaded on any device like mobile phones, Linux, Windows, Mac, or laptop easily from the app store without paying money, and also it is free to utilize its service of earth view from Google. Not only that you can have an Earth view from Google by browsing the official site of google earth in google chrome where you do not have to download the app on your device and it is totally free of cost to browse in your web browsers too.