Which software should I have to start to develop IOS Apps for some business purposes. I'm a newbie here and don't know what method or strategy will work perfectly for me. So, I appreciate all answers equally. Thanks
I want to have my own IOS Applications.
You have to use Xcode, to develop either in Objective C or Swift (IMO, recommended).
Then, to build the User Interface, you can choose UIKit (my preference) or SwiftUI (which I find harder to use).
You have several tutorials from Apple :
Intro to App development with Swift.