Good news: No, Instagram does NOT notify anyone when you visit their profile. This is different from stories.
Profile visits: No one knows you visited. There's no visitor list like some platforms (like LinkedIn).
Story views: The owner CAN see who viewed. This is where you need a tool like DarkViewer for anonymity.
They're all fake! Any app claiming to show who visited your profile is a scam. Instagram doesn't provide this data to any third-party app. Don't trust them or give them your credentials.