The "Real Guests VK" application allows you to track who visits your Vkontakte page. The application will show those who recently visited (during the NEXT 24 HOURS) your page. The application DOES NOT SHOW guests BY ACTIVITY (if someone likes you, sends a comment, writes a message, etc.), because you can find out this information without such an application.
The application shows not the exact, but the APPROXIMATE time of visiting the page, so you need to take into account some error.
The application SOMETIMES shows the visit NOT IMMEDIATELY after updating the list, but after some time.