I am reviewing the recently released ios app: 123D Make Intro

Get the app: http://itunes.apple.com/us/app/123d-make-intro/id513915986?mt=8

In the app, there are three options, create, load and kits. Let’s first choose the create option. The app will then pull up a view where you can free draw a shape. Let’s draw a simple shape like this. then tap on Next. Then, wait a second.

Then, the app makes the drawing you drew into a 3d model that you can build out of cardboard. You can easily rotate around it and it is easy to see all the corners of the model.