This isn't their first app at all.<p>They've already released Windows Live Messenger <a href="http://itunes.apple.com/us/app/windows-live-messenger/id376196406?mt=8" rel="nofollow">http://itunes.apple.com/us/app/windows-live-messenger/id3761...</a><p>as well as a Bing client. <a href="http://itunes.apple.com/us/app/bing/id345323231?mt=8" rel="nofollow">http://itunes.apple.com/us/app/bing/id345323231?mt=8</a>
Quick review: first thing I noticed is that not all graphics are "Retina"-ready and it shows; their use of the UITabBar is pretty bad IMHO (tapping an icon never switches to a tab but flips or slide to a different UIView; some navigation is inconsistent (e.g. you go to recently viewed, see an item, the back button brings you back to a different view); you have a bunch of "Unfiled Notes" that you apparently can't file: it's syncing the info somewhere so I imagine that the desktop app allows you to rearrange these notes, but not being able to do it inside the app means that the app in itself is not usable; someone asked: I can't find a way to do OCR on pictures taken.<p>All in all, meh. At first sight, it reminded me of Evernote, but I think it's missing what makes the desktop version of OneNote interesting: the ability to take notes however you want by just clicking somewhere. The size of the iPhone doesn't really allow for that so I can understand. But if you're not using the desktop version, it looks like this is no special note-taking app.
One of the nice features of OneNote on the desktop is the ability to paste in an image, and then right-click and do an OCR operation using "Extract Text from Image".<p>This article doesn't mention it at all, but it would be a great thing to see on a mobile (even if it included a cloud round-trip).
Besides the major CAD/CAM/CAE softwares, OneNote was the only software I really missed after moving to Mac/iphone. It is great for note-taking in general and made by one of the most innovative teams at Microsoft.
Just went to try it out, but I get "Login failed, error 400." If you look at the reviews, you'll see this is a widespread failure. This is not the way to launch.