Even if you’re an amazing wordpress developer it’s true, you can program your own custom fields or to be more precise, to copy from your previous work the code for your new one.
There are many features in this plugin:
_ you can create all kind of endless custom fields, for your page or post or post type,
_ you can limit the custom fields to appear only in a certain template or only one kind of post type, you can add many rules with “or” and “and”
_ you can choose from many types of fields
and the options are endless.