Tool bar interface is so poor in this app. We need more customization, easy access to different colors, eraser and so on), we dont want menus inside menus, we want shortcuts. And the selection tool interface (when something is selected) is also horrible. It blocks the original tool bar, where undo and redu icons are, and since your selection tool is so badly implemented, those actions are needed. Why dont just put the selection tool specific options on a context menu above the selected object (where is easy to reach), instead of creating a new toolbar. It just so frustrating. I think you should seriously check how notetaking apps for iOS look, since they have more experience and they are more refined.