So I just uploaded my first app to the Apple Store
and there was one issue: Metadata Reject: Design Copycat
Please make the necessary changes to your app so that it does not infringe upon the rights of a third party:
- Remove all third-party marks from your app icon, screenshots, and previews.
This issue refers specifically about options 2 and 3 from your question. You can discard #1 for sure.
Without seeing your app icon, previews and screenshots it's hard to tell what's wrong with them but it's definitely something that's already somewhere else. It could be another app with the same icon set or very similar previews. Do not discard the possibility that it could also be part of your app icon or previews, are you including logos or slogans from 3rd party companies?
If your app previews have this images that the API is pulling from different sources you may want to tweak them to show some other images, just for the previews and screenshots not the actual app.
For #2 the recommendation will be to have the same icon in the app than in the store. Mostly because users can identify quickly.