zingfit offers you the ability to customize the names and labels of a variety of features within the platform. Do you want your customers to be called clients? Do you want your series to be called packages? These are possible by configuring your system labels.
Navigate to Admin > Configuration > System Settings. Here you will see at the top right a button that looks like this:
After you have selected the Configure System Labels button you will be brought to this screen where you can change a variety of names and labels to suit the needs of your business.
When you are finished making your configurations simply click the Save button and you're all set.