Most of these "viewer" tools are not legitimate. Because VSCO’s API (the software that allows apps to talk to each other) does not share visitor data with the public, it is technically impossible for a third-party website to generate a list of people who looked at your photos.
Does VSCO Notify a User When You Screenshot Their Profile? - wikiHow vsco anonymous viewer
Avoid these services. Security Risks: These sites often contain malicious ads or phishing attempts designed to steal your login credentials. Unnecessary: Since VSCO doesn't track views anyway, these tools don't provide any privacy benefit that you don't already have by using a standard browser. Data Scraping: VSCO actively works to block "bots" and "bad actors" that scrape content through unauthorized third-party tools. Summary of VSCO Privacy Feature Is it Anonymous? Notification Sent? Viewing a Profile Yes No Viewing Photos Yes No Taking Screenshots Yes No Favoriting/Following No Yes Reposting No Yes If you want to maintain total anonymity, simply browse through a web browser without logging in. If the creator has disabled non-account viewing, your only option is to use a standard VSCO account —rest assured that even with an account, your visits remain private unless you hit that "favorite" button. Would you like to know how to Most of these "viewer" tools are not legitimate
Some users started to experiment, posting content that would attract the mysterious viewer's attention. Others took a more cautious approach, deleting their posts or restricting their account visibility. - wikiHow Avoid these services