Is there an app for iPhone to notify somebody if I block them on Facebook?

I blocked a girl that was never friends on Facebook with me and she texted me asking why I blocked her and said she got notified from an app to let her know who blocks her. Is this possible or was she snooping?

Nah she's lying she wouldve searched for you or tried to message you and found you werent there

There are extensions on Chrome where you can see who has deleted you & usually what they did, if they just deactivated or unfriended or blocked you.

There Are No Apps That Notify People When They Are Blocked Who Ever Told You That Was Lieing To You They Probably Just Noticed When They Tried To Search You They Could Not Find You