Understanding the Flow after build

Hi all,

I am new to Ionic, I am currently developing on windows. I have no issue with building Android app. As I am on windows, I managed to build the IOS version on Ionic Pro. Now I have no idea how to install the app into my iphone. Do I must have a mac? If that is the case, how to publish the app to the apple store after I build it? Please bear with me.