It would be great to have a Revit 2D only Drafting Tool for IOS. It could be simple sketch model with lines and filled regions only. Once your drawing is complete, you should be able to import into Revit as a Drafting View. This would be great for working on details or concepts away from the office. It would be a simple program that would bring Revit functionality to the IOS Platform. I use Revit often for 2D Drafting and it would be nice to work on the go or at night when I have ideas I want to study. Yes there are other IOS Drafting programs out there, but none work well with Revit.