If you download a "software viewer" from a link, you are likely installing:

Fake tools trap users in endless loops of promotional surveys to generate advertising revenue for scammers. Account Ban

: Facebook (Meta) explicitly states that third-party apps cannot provide the ability to track who views your profile or bypass private profile settings. Most apps claiming to offer this functionality use public APIs to show you a random list of your own friends rather than actual "viewers".

"No tool can bypass Facebook’s privacy settings. If a website claims otherwise, it is a scam. Never enter your credentials."

Conclusion Services advertising a “Facebook private profile viewer” (including those using names like Istaunch) exploit human curiosity and gaps in technical literacy. They are, in the vast majority of cases, scams, social-engineering fronts, or malware distributors rather than legitimate tools that bypass Facebook’s server-side privacy controls. Beyond technical implausibility, attempting to obtain others’ private data without consent raises serious ethical and legal concerns. The safe, responsible course is to respect others’ privacy, use official platform features, and rely on trustworthy security practices when seeking or sharing social media information.

The "Facebook Private Profile Viewer by iStaunch" is a tool or feature that claims to allow users to view private Facebook profiles. However, I must emphasize that using such tools can be against Facebook's terms of service and may pose privacy and security risks.

No legitimate external tool can breach Facebook’s database to pull hidden, private posts or locked albums. What these lookup tools actually do is aggregate fragmented information that is already public, such as: