Softaculous is a commercial script library that automates the installation of commercial and open source web applications to a website. Softaculous scripts are executed from the administration area of a website control panel, typically via an interface tool such as cPanel, Plesk, H-Sphere, DirectAdmin and InterWorx.
https://www.softaculous.com/softaculous/apps/others/EasyAppointments
If you are using one of the major hosting services, you will most likely already have seen an option on your cPanel called Softaculous. You can automatically install Easy!Appointments on your server by starting a new Softaculous installation. Check out the video below on how to perform a brand new installation.