The author, JK Rowling, is currently on the single biggest hate campaign I've seen a celebrity run against trans rights.
It's negatively affecting the connotations of being associated with the 'Potterverse,' and support for Potter these days is widely considered inconsiderate, especially in the ever growing queer community.
Simply using a name like this was enough to turn me off, and certainly I would not want any friends to have a similarly triggering experience, so I therefore can't recommend it's use, either.
While Potter actually used to be a portal of expression for these types of people, it is now associated with repression and ignorance.
It sucks that any time I see media related / referencing Potter I honestly am immediately disgusted, but this is clearly what Rowling wants. She has had many chances to step down and apologize to her fan base, but she insists on invalidating us.
I grew up with those books, they meant a lot to me, and actually produced a crisis of faith to me with regards to separating art from the artist.
Michael Jackson was, pretty definitely, a child molester. I listened to his music for years after until I finally decided I couldn't do it, as a survivor of sexual assault myself, it makes it difficult to be caught casually listening to him.
The Potter books are good, but there are a lot of other great books out there (and inspiration for names!) that wouldn't immediately turn off any and all potential trans customers like myself.
I will note that it could be amazingly positive PR for you guys if you chose to rename the app for this program, I know I myself would sent it to a few of my queer tech blogging friends.
Unfortunately, to even be a fan of Potter any more is to be a fan in spite of, or choosing to ignore Rowling's continuing, relentless campaign to invalidate us as people, and has drawn tangible battle lines between fan communities.