Curious why the title here excludes "heavily" from heavily trained. Since even "rather heavily trained" was being quite generous since it clones the entire app (other than the shade of color), but removing heavily makes it a different statement.
Hacker News submit bot auto removed it. It editorializes for less clickbaity titles.
Would be good to try a few more popular app types, such as food delivery, news, dating, and a twitter clone. I don't know if the rest of the thread has tried that.
I couldn't (skimmed) find any recent Adobe-like clauses granting themselves permission in their terms of service though, the nearest is related to community comments.