I was looking for an app that will help me get my research work and documentation done easily when a friend suggested MarginNote Pro. The app actually does help me and is a lot different from other productivity apps. You can use the app to highlight the text you want to focus on or even add a note or two next to it. The app can be used to work on Pdf’s, ePubs and even other documents too. The UI is quite simple and easy to use and based on your needs, the app also helps you to store your document on your iPad or in the cloud as well.