You can follow these steps to create a membership program using Subify:
Create a product and introduce your membership features on it like the following screenshot.
(To visit this sample product go to the Subify page on the app store then click on "View demo store")
Open subify and go to the "Subscription rule" page
Create a rule using this new product and add the delivery frequency you want to offer for it then save it.
Follow the steps in this guide, to remove the one-time purchase option.
Customize its appearance on the customization page or contact us to do it for you totally free.