Mobile Apps for Ham Radio?

So, I’m at a mini-conference for mobile app developers. I currently don’t do mobile apps, but since I am a freelance Web developer, and a lot of the stuff people used to do on the Web is moving to mobile devices, I figured I better get on board.

For example, I do a website for a construction-industry trade magazine. This website is reallycrying to have a companion mobile app. One reason for this is that many of the readers are mobile types. That is to say that they are on the road a lot and not sitting in front of a computer.

The question is how the mobile app would be different from the website. Will the mobile app users want to read magazine articles? Will they want more news? Is there anything that we can give them to help them do their jobs better?

Of course, after pondering this for a while, I started thinking about ham radio mobile apps. There are already EchoLink apps out there, and I would suppose that there are already study guide/practice test apps (although possibly not). One idea that occurred to me is to develop an app that would allow users to send Morse Code to one another. This could be used for code practice as well text (code?) messaging.

What do you think? Are there any good amater-radio mobile apps out there already? What kind of amateur-radio mobile apps would you like to see?