[Mr.Monkey]

well it just like apponfly . it is an user rdp but with application preinstalled . it is great for doing thing like emergency desktop if you cannot have a access to computer and you are in phone but you need to open a file that cannot be read by a phone or just to use desktop app on anywhere . but it lacks administrator . that is the biggest problem

I believe what he wants is a way for users to not use app to VNC/RDP into the VPS but a web app to do normal standard functions.

Look into Apache Guacamole.
https://guacamole.incubator.apache.org/

-or-
the use of noVNC
https://github.com/novnc/noVNC