Below you'll find a list of scanning apps we've tried. Maybe one is right for you.
You will prompted to create an Evernote account, but you don't need to. The app will be fully functional without doing so.
Within the settings you will see that you can set it to scan as PDF.
Once you have scanned your document, you will be able to email it.
Smart Doc Scanner: Scan to PDF (android)
from their website "Use “Smart Document Scanner” as an ultimate android scanner app to scan, enhance, convert files into PDF file, OCR, convert jpeg to pdf file, add annotations, sync and file your prescriptions, invoices, contracts, bank statements, whiteboards and much more and gain accessibility to them from anywhere and at anytime. Make it your mobile scanner, receipt scanner and android scanner app on the go."
If you have any other favorites, let us know and we'll post them here.