This app was mentioned in 11 comments, with an average of 1.18 upvotes
I've been using TurboScan for 5+ years now. It's clean, simple and very practical. Has everything you'd need from a scanning app. Strongly recommend the paid version to support the dev(s) if not anything else.
TurboScan is also another good alternative.
IMHO TurboScan is better than most.