While working with a possible customer, I needed to quickly get a document signed and sent back to them. Being that I was not at the home office I had to find a way to print out the contract and send it back signed. Since I had a printer near me I could print it out; But how was I to then scan the signed document to send via email? I remembered that the Google Drive App on my phone has a scan feature. I was not ware of how well this worked until I used it. Within minutes I scanned the document and had it emailed. I explored this feature and also found that you can add multiple scans in one session.
This may not replace you $500 scanner but this is a great solution in a pinch.