I am trying to figure out which app is the best for collecting emails. I don't need them for marketing, I need them so I can email people when I create a class. It's like a waitlist. But I need to keep them organized for the specific classes they want to be emailed about. For example, I would like to put on my website something like, "Add your email here to be notified when August's classes are scheduled." After they put their email in, it's saved somewhere that is classified as August's classes. Then I can do the same for September's classes when I'm ready for that. I hope this makes sense.