Usability: Khan Academy has a very simple interface for many advanced subjects. If a kindergartner wanted to learn calculus they could. When you first open the app you are greeted with a list of subjects such as math and science. Those subjects then have a list of their different parts. An example of these different parts for math would be algebra, geometry, trigonometry, calculus, etc. All you have to do is click you class and learn.
Support: For the app it self there are no tutorials. With such a simple design tutorials aren't needed. The app does have tutorials on the subjects you are looking for however.
Engaging: Khan Academy is very open ended. In rare cases if the subject isn’t there that you are looking for you can add it yourself. Many student will be satisfied with the help they will get from this app. It holds a lot of information, and it can help you study for anything.
Export/Sharing: Sharing and exporting isn't really incorporating into the app, however you can email any information you want. You can create your own problems as well and share it to people using Khan Academy.
Customization: There are no appealing customization options, but you can customize a course. If multiple subjects are in the same problem you can add the math, science, or the history elements into one page.
Collaboration: You can not collaborate with other students the cloud. You can only see what other students have created for subjects.
Import: There are no importing options. The courses you create have to be moderated and accepted into the system before other student can see them.