OneNote Blog - OneNote for iPhone and iPad update, new notebooks and sections on iPad, and additional improvements on iPhone

Another in the long list of iPad apps that require iOS >= 6.0 (i.e., first-generation iPads are not supported)

"Today, we released a new update to OneNote for iPhone and iPad. With this update OneNote on the iPad is untethered because you can now create notebooks on the iPad as well as create, delete and rename sections.  When the team shipped the update we heard some customers asking for these features on the iPad so they could do everything from within OneNote and we are pleased to announce that this update is now available.
If you already have OneNote installed on your iOS device, get the latest on the Updates tab in the App Store. Or you can get started for free by downloading OneNote for iPad or OneNote for iPhone from the App Store."

OneNote Blog - OneNote for iPhone and iPad update, new notebooks and sections on iPad, and additional improvements on iPhone