How can I install and run R on an iPad? I teach a class that uses R as part of the lab and one of my students uses an iPad for her primary computer.  Is there anyway to install R on an iPad?

I found some old blog posts that say it isn't possible but I have not been able to find any information less than about 5 years old.
It's actually pretty simple, in that, if it is not in the app store it can't be installed, unless you want to go the jailbreak route because you found an "R" app for jailbroken IOS devices.