What are apps?

After you watch this tutorial, you will have a better understanding of what an app for the iPhone is. Zollotech is a great resource for iPhone information.  In a nutshell, an app is software for your iPhone. For example, Facebook or Google. There are hundreds, actually thousands of apps for your iPhone; many are free and some you pay for.
From Zollotech:

 

Now that you know what an app is, how do you download an app?

This is how you get Apps on your iPhone