Do I need to have iWork on my iOS device in order to view files that are stored in iCloud Drive?

To elaborate on my question, this is what I was expecting. The iPad and iPhone in this picture looks as though there is a place on iOS where you can see all of the files that are located in iCloud Drive. You can also see that each file has an associated tag (the colored dots) which we were able to start using on Mavericks. I understand that the Mac you see in the picture has iCloud Drive as a native(ish) drive on the computer which will be available with Yosemite, but I don't understand where on the iPhone/iPad these shots were taken from, assuming it's iOS 8.0

On the up side, I just received my iPhone 6 today to find that iPhone6 and 6+ users are given Pages, Numbers, and Keynote free for their iOS devices.

Thanks for the reply. Yes, that makes sense with iWork, that you would not be able to view, for instance, a PDF or Word file in iWork. I guess I was just assuming that there would be an app where you could access (but not edit) any file stored in iCloud Drive, similar to the Dropbox app for iOS devices. (As Dropbox, no longer lets you view files on the iOS app, I was hoping that iCloud Drive would be more user-friendly.

Do you have an idea where the location of that picture that I attached in my last reply was on the iPhone and iPad? I think that's the reason I thought there would be a separate iCloud Drive app... because Apple's website has had those pictures up since they announced new iOS 8 features a few months back and it kinda looked like it would have its own app.

"Through Dropbox, you can reach all the documents stored on iCloud Drive."

Wait, how do you view files stored on iCloud Drive through the Dropbox app?

Ooookayyyyyy. Okay I get it now. How confusing of Apple to post a picture of something that wasn't able to be reached through one of THEIR stock apps. We all know how much Apple loves their stock apps. Thanks for explaining this!