I'm able to save PDFs to any cloud based storage applications like Dropbox, iCloud and Google Drive.
The OCR feature and the search with scan is great.
The price to get all the features is quite high at $8. There are other apps for free.
Scanbot is a great mobile app. Is very stable and doesn't crash. It integrates with a myriad of cloud storage services like dropbox, one drive, google drive, slack and evernote etc. It has multi-page support for document scans and documents can be shared as PDFs. You can also fax documents. Unfortunately you need credits for that which cost around $0.30 to $0.50 on average.
It has a great algorithm to detect the edges of sheet and correct for any off-angle shots.
You can feel comfortable with the security it provides. The pro version integrates with touch id or face id to keep your files secure and from prying eyes.
The OCR feature is great. It allows you to search for text inside the pdf that were just scanned. It also has a feature called smart scan which allows you to use save templates to easily safe your scans.
Scan forms after signature from engineers, managers, etc.