how to make tutorial for app

how can we make a tutorial that show all feature of app, similarly in kodular companion and deep host application

List down the core features of your app, and decided what you want to show in the tutorial and what you think the user can figure out on their own.
If everything is on a screen, you can try using the spotlight (like the :kodular: companion) or show captions to guide the user.

You can add screenshots and info related to it in the about this application as a tutorial.

While your app loads, show different phrases that help the user understand the app in a better way.