Snapchat's built-in Story Viewer feature lets you see who viewed or replied to your Story (swipe up on your Story in your profile view to see names of up to 200 viewers, plus screenshot alerts). That’s the official way, and other tools claiming to show views anonymously aren’t supported or reliable.
Snap Story viewers fall in the category of third-party tools, although they are not safe or within the rules of Snapchat, and you are better off watching the stories inside the app.
Snap Story viewers are categorized into third-party tools, which are neither safe nor within the scope of Snapchat, and you should prefer watching the stories within the app.
In order to view Snapchat stories on a Snap Story viewer without chatting:
Install the application on the machine (as you have done).
Enter into the Snapchat account that you wish to see stories on.
Go to the Stories or Friends section- you can see posted stories in the usual manner.
Close the chat section when you do not want to mess with it.
Turn off notifications or access to chat (where possible) in any app.
Reminder: It is not possible to invite third-party viewers to official Snapchat, so make sure that the app that you use is not unsafe and does not breach the terms of Snapchat otherwise, you can encounter problems with your account.