I have an idea for an app that I would like to build, but I have no idea what language to learn to do it. I know iPhone is Swift, but would it be better to do it on Swift first, or learn it in something like Kotlin for Android and then create a Swift version later.
Not only that ideally this app would also be a website (which I could create using Oracle APEX as I already have a draft).
Any advice? I'm getting confused between all the many different options.