Long term review
Ive been using this app for a few years now, and it works great for me. I have made pdfs of all my important files, and emailed them with no problems. I use the cloud backup, but I keep a separate backup elsewhere as well. (I dont trust cloud vapourware). Other people have complained about email issues, but I havent had them. This is one app I actually find useful. The quality of the copies is on par with a good flatbed scanner.
RKerinon about
Tiny Doc: PDF Scanner App, v4.1