Shinyapps.io is the easiest and quickest way for sharing Shiny apps with the world.
Share your R/Shiny applications on Shinyapps.io for free or choose paid cloud hosting with push-button publishing. Your self-contained and isolated apps are hosted in the cloud on shared servers operated by RStudio.
The free tier is a sweet deal that is the path of least resistance when combined with the push-button publishing option. It is ideal for people just starting with Shiny or ones using Shiny as a hobby or building their portfolio. The most expensive Professional option is best suited for smaller agencies who do not want to deal with running their own servers.