windows to ios?

hello unity community, i was wondering im new to unity and i have the free version and im thinking about purchasing a licence for android and ios, i make android apps right now, so the question's are

1. it says that the unity program doesnt run for ios on windows, so say i buy the licences and i already have an app developed for android with it on windows, will that apps project open on an apple computer even though it was made in windows?

2. i have the free version now, so if i make an app with the free version, its ok right, because when i buy the licences it will just open and run the same?

thank you for your time, hopefully this will work out and well be seeing more of eachother