Scanner Pro 7
Probably the best way to scan papers
Adobe's free scan app with text recognition superpowers
Search physical documents using your phone's camera 🔎
As a student, I've had the problem of looking through a textbook searching for that one paragraph of useful information I saw earlier, and not being able to find it. This was my solution. It uses OCR to search for text in real time, and instantly highlights the results, so you don't need to sit around trying to find that one bit of useful text.