app for controling android with another android?

yeah i want to find an app for controlling an android with another android? Like screen mirroring.

For example: (phones im planning to use with)
Moto xt615 controlling a sam. galaxy s4? Like the moto seeing whats exactly on the screen? app for that?

i tried vnc viewing, but i dont wanna pay for more and i cant find any mor vnc servers,
teamviewing didnt work for some reason.