As a college instructor, I like to provide feedback for my students' writings. At the grad level, students are required to use APA style formatting, so I like being able to track corrections and suggestions in a student's paper and the ability to insert comments as one is able to do in Microsoft Word. I have attempted to use Quickoffice and iAnnotate apps. They are really not satisfactory for my efforts. If any can suggest apps, which might fill this gap, it would be appreciated.