How to write an app for ios?

Question

iOS

Of course, I still know very little about programming, or rather, nothing, I just entered college for this profession, but I have an idea to write an application for ios, let's call it "vkoff". The idea is that by going into it, you could immediately turn off all sessions on other devices, except for this one, you could view activity and all that, in general, as in the "My settings - activity history" tab on the VK site itself. The vk app itself does not have this function, and I think it will not, but a simple application to end all sessions will be convenient for many.
I have a macbook air mid 12 in my hands, the power should be enough for xcode, thanks for your attention)

Answer 1

Hands. VKontakte has an apishka. That's all.

Answer 2

There is a great book with all the information you need to get started building iOS apps. It is paid and in English, but if you are serious, then it is worth it.