Shiny makes it easy to develop interactive web applications that run on your own machine. But by itself, it isn’t designed to make your applications available to all comers over the internet (or intranet). You can’t run more than one Shiny application on the same port, and if your R process crashes or exits for 




Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).