"I want to try making an iPhone app. But where should I start?""I've started development, but after building the screen, I don't know what to do next."For those people, I have published a book on Zenn ...

I think it’s fair to say Apple owes its multi-trillion-dollar success to its apps ecosystem. Think about it. If the Apple II from the late 1970s could only run in-house developed apps, if that first ...