iPocket Draw is RealCADD's sister program for iPad and iPhone.
As such files are interchangeable between the two programs. That means you can start to draw something on your iPhone or iPad (perhaps at a site meeting or a meeting with clients) and then later on, open it on you mac laptop or desktop computer and continue working on it.
And you can do the reverse: open a RealCADD drawing in iPocket Draw on your iPhone or iPad.
Printing parameters and/or views don't necessarily transfer exactly and may have to be reset.