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.