OneNote for iPad & iPhone has been updated to a new version and it is available in the App Store right now. For more details about this release please see here:
For overall help please go here:
The updated version of OneNote requires iOS 6.1 or higher.
Why is the app 250megs?
There have been a few reviews in the App Store where people commented on the size of the application which is around 250 megs and then it expands to a larger size once installed. There are a few reasons for this. First the app is localized into 29 languages so it has all of the resources and translations into all of those languages. Many languages need specific fonts to correctly render their scripts and Office has always had a set of default fonts that we needed to include so the app would properly render your content. Second the app has retina art so you have great looking icons & UI for all of your retina devices. Finally there is a lot of code in there to support all of the OneNote content types and that is why the app is much bigger than before.
We are listening to your feedback and we are looking at ways to address it in a future update.
Finally if you look at other large apps like Apple's Pages & Keynote are 257 & 319 megs respectively. Still though we are listening.
Does OneNote for iOS support SharePoint notebooks?
Yes! You can open notebooks from on-prem SharePoint (SharePoint 2010 or higher), from Office 365 and SkyDrive Pro. For more details on this you can read this blog post: OneNote for iPad & iPhone connecting to SharePoint, Office 365 & SkyDrive Pro.
Where is <my favorite feature>? When will it be added?
Since we use the app, too, we want it to be as awesome as possible. We listen to all feedback and consider it for future releases. Your feedback helps us know which features are most important to you. However, for a variety of reasons we cannot discuss planned features, their priorities, or the dates that we expect these features to be released. Please keep submitting your requests in the app store reviews as well as in the comments below, we are reading them!
My question is not answered below, now what?
We want your feedback! Go to the Microsoft Answers forum and post your questions there. It is frequented by many users who might be able to help and is often visited by the OneNote product development team and the Microsoft Support team.
We will be updating this as we continue to hear from customers about the issues or questions that you all are facing.
-Daniel Escapa, Program Manager on behalf of whole OneNote on iOS team