I have a question about the app development at the app development

I'm also a beginner in Android, but I answer

If you want to know more, it'll be accurate if you open it, but I think it's native. It's not accurate

Android and iOS have different design guides, so it is difficult to make the same. The composition can be made almost the same. (This can't be accurate because Apple and Google policies are different.) )

You can make it completely, but shopping malls are different from regular sites, so it can be more difficult. In order to implement the above functions, you need to make an API that functions like above in addition to the shopping mall. Of course, it doesn't matter if it's a simple web view. Language is java as it is

Absolutely not. In a lot of shopping malls now, partially using a board geunu and I don't care.

It's a native app.

There's no special way to make the design and composition uniform. Of course, it is hard to make it exactly the same because the platform is different, but it is similar because it is the same service.

Of course, it can be implemented. However, in that kind of application, the Android application only acts as a front-end, and it seems desirable to do most of the work on the back-end (server).

It doesn't matter, but when you're creating a native app, things like that Nouboard might not be very helpful. If you use frameworks such as Ruby on rails and Django, you can develop functions such as bulletin boards and membership management easily and quickly.