For the R fans out there, think of Analyser as a batch processor. I found that using Textastic and Files improves the experience. Of course, when I started using R (S, actually) it was Emacs and the CLI, so it wasn't that big of a stretch for me. It's not interactive (see ?interactive).
Also R runs lots of helper programs and uses .so files profusely, which Apple forbids. so it is a cut down version.