This is full of copyright infringement. If you don't want your app to be DMCA'd I'd suggest you remove all references to Harry Potter.
[1] https://fanlore.org/wiki/Rowling_backs_Potter_fan_fiction
What I initially thought was whether this can be considered fan art, and since it’s free (and open-source) I think it might be okay.
But, I’ll check in detail and maybe replace all titles before publishing it to the stores.
https://mobile.twitter.com/gothspiderbitch/status/1467693856...