ZipInstaller is a free and easy-to-use app for installing.zip files. It also allows you to do an auto-install, which is useful when you don't have time to select each file manually. So, if you want to do an auto-install, you can select all the zips you want to install, and the app will install them for you.

If you don't have the time to install all of your zips, you can send them through the app's "Send/Share" menu.

You can do all these things without spending money.