The app in my mind would be as follows.
On something the size of an iPad, it would be full screen.
It would show one page at a time, and you can swipe it off screen, left or right (and arrows like you see on google photos) to advance to the next or previous page.
A button to allow you to delete the page.
on the back end.
User prints PDF or whatever file type is needed and saves that file to a network location that is unique to each reviewer. The app, based on logon, attaches to the designated network path and downloads the files.
An additional nice component would be a process that grabs all things saved to this location and forwards them to the staff doing the last step, adding it to the backend system.