In Short

OneNote is Microsoft's note-taking software available on all major platforms. Notes are synced through the cloud and changes are instantly seen across device. OneNote is available on Windows, Windows Store, Windows Phone, Mac, iPad, iPhone, Android, Amazon devices and the web. OneNote can truly be used anywhere.

On Windows Phone, OneNote is currently an included application and available out-of-the-box. This may change in the future, but for now updates to OneNote on Windows Phone come when the operating system is updated.

OneNote started out as a desktop application on Windows in 2003. Over the years it has matured to include many, if not all, major platforms.

OneNote files can now only include notes, handwritten or typed, from users but also drawings, screen clippings, audio commentaries and more.