In my opinion, after testing many scanner apps, CamScanner is top dog. As a matter of fact, I liked the free version so much I purchased the app. At home, I do not own a printer/scanner combo as most people do. I use CamScanner on my phone as my scanner and have found I have used it more than when I did have a computer connected scanner. It is fast, will auto align, auto brighten, and gives multiple options to save the document to the cloud (such as Google Drive, Box, Gmail, etc…). I suggest giving it try… CamScanner is available for Android and iPhone.