Bookmarking state on shinyapps.io & locally

[paulcbauer]

I want to use bookmarked states of my shiny app and let users access particular ones through selectInput() (users don't necessarily need to bookmark themselves). The app shall reside on shinyapps.io.

As I understand "server" bookmarking ("url" does not work in my case) is not possible on shinyapps.io. Is there an alternative way? Could I make the bookmarks locally and somehow upload them to shinyapps.io so that they are accessible? Thanks.

Update: When I simply upload the local shiny_bookmarks folder to shinyapp.io and try to access one of the bookmarks I get Error in RestoreContext initialization: This server is not configured for saving sessions to disk.

The app is for a research project.