Looking for a revising app (for writers)
Hello, everyone. I'm looking for an app for the iPad  that was made with revisioners in mind. I use my tablet for writing, and what I have been doing is copying my work into a handwriting app (Notes Plus) and mark it up with the red pen and etc.
What I am looking for is an app that will allow me to put my marked up work next to an active writing space so I can work on actually revising the work without switching between apps and derailing my train of thought. Are there any apps or tricks out there to do such a thing?
It doesn't have to be exactly like this (a literal side by side). Just something that's made with revisioners in mind that want two copies (a marked up and an active writing one) of a work in a single app able to be viewed at the same time.
Thanks for any help,