I was looking on the app store for some sort of Hammer guide but I couldn't find one. I'm thinking of making one, but not only do I have no idea how to make an app, I'd also need people to help me write the guide. So I'm just looking for people with skills in making apps and someone that could help me write a Portal 2 Mapping guide.

I don't know how to make apps, but I think if you found a way to "app-ify" the VDC, then that'd work well.

I don't know about App Store apps, but for Android I think you just need to learn Java. It's also cheaper to make an app for Android.

I like the idea. You could also, in excess of your guides, implement a link to the developer community guides.

Unfortunately there is no app for the Hammer World Editor. It would be amazing if someone could create one but it would take weeks, weeks and weeks. Good idea!

Hammer with the small touch screen is pretty hard to use. It's nice to be able to use it on the go, but navigating around a 3d area without a mouse takes a lot of concentration, especially if your somewhere bumpy, like on a train. If someone were to make a hammer app, it would need it's own UI. If you want portability in hammer, but you don't mind it being difficult to use, I would suggest getting a surface pro.

You could use http://appinventor.mit.edu/explore/front.html for creating your app. Not alot of programing required.
@Goldenknighttim I think he wants to create an app for guides for Hammer, not the Hammer Application itself.

Maybe you could try and make pti as an app instead.