One great app!

This is one great app for 2D vector drawing on an iPad. If you are familiar with basic CAD programs or drawing programs like Illustrator or Inkscape, iDesign will not disappoint you. The basic cost is so low and the add-ons worth every penny. I have used this to create plans for various objects and they printed exactly to scale. I also like the fact that you can import files from other programs and tweek them in comfort on your iPad wherever you happen to be. Another plus is that their customer service response to questions or problems is fast and courteous.

Gyrojeff about iDesign, v1.6