The Purpose of UCS on my PC?

Hello Everyone I hope all is well! There is a lot to absorb and I have a tendency to jump around on some of the projects I get excited about. I am trying to find out why the need to install UCS on my Computer when I can do everything on my Android phone? I apologize if I missed something but tried really hard looking for an answer on this. I also think what UCS and the community is doing is really awesome I have never seen anything like this so thank you.

Found the answer to my own question in the manual lesson learned.