Initial brainstorm phase can only get you so far, the real test of your project is letting general people access it without you looking over their shoulder. Sometimes you will find that your assumptions are wrong, or that you need to add extra fields to the form. Say for when people decide to apply to use an TestFlight build, and they don’t have an iPhone. Don’t get mad at your users when you have to change your project to handle how they are actually going to use it. Don’t forget to test your projects with real people.