You login with Google or Apple, so I only have your email. You set your own username and that's what other users see. I won't share anything with any third-parties.
Helpling is open-source. If you understand code, you can view it on GitHub to see what data we store and how we use it.
If you'd like to delete your account and all data, please send an email to firstname.lastname@example.org and I'll take care of it for you.