The R package heemod has high-level functions and quite easy to program with for R users. However, learning R can be an impediment in its adoption.
heemod-gui was created with shiny in order to provide a graphical user interface to program State Transition Models such as Markov Models, with a lot of features provided by the powerful heemod package.
With heemod-gui, no coding is necessary to build a Decision Model in Health Economic Evaluation.
Right now, heemod vignettes from a to f can be reproduced on heemod-gui.