You need to host it on a PC first, preferably a dedicated server as it's always on. Having to turn on your PC to use a program on your mobile device kind of breaks the point for most. The download description and config's from WebJCS explain how to set it up.

Then just open Chrome on your android and navigate to the IP adress from your PC or server followed by the port number WebJCS listens to.

This probably applies to larger screen devices only, as you need enough screen space to display the 4 JCS views without zoom, and still have enough space to work comfortably.