I like to use my iPad for a lot of tasks. I’ve written about taking notes on the iPad using Penultimate and the Jot Script. I found an app called TeX Writer. It is an app available for iOS, Android, and there is a new web version.
I really like that it allows me to compile documents on the go whether I am connected to the internet or not. It also connects with Dropbox, so I can include all of my packages in a Dropbox folder and it will allow me to edit TeX documents I have saved in Dropbox. One issue I am having is I have not figure out how to select text in it yet (I think this might just be a glitch with iOS 8, though).
What TeX editors do you use on your iPad or other tablet? What do you like about them? What do you dislike about them?