iAnnotate is an easy to use app for reading, marking-up, and sharing PDFs. You can annotate PDFs, organize them in the iAnnotate Library, and share them with colleagues and on different devices. iAnnotate gives you access to highlighters, pencils, bookmarks, and text notes, as well as quick search and navigation of your PDFs. It also features multi-tabbed reading, smooth highlighting, multiple options for reading, including tapping to advance or go back a screen. The app is priced as a subscription, beginning at $16 per device per year.
This application requires a server which may be located in the Cloud
Branchfire builds software that simplifies how people work. Its award-winning iAnnotate app allows users to read, mark up and share documents and images via an iPad. The company also offers an enterprise version of iAnnotate for large organizations. Over one million people worldwide use applications powered by Branchfire. Based in Chicago, Branchfire is a privately-held company.